Appreciate this take. The peace of mind when it comes to overdubbing is valuable to me also. The claims from Snd are pretty steep with the Acme-4. But those who have it seem to stand by it.
What are those claims btw?
Definitely watch the deep dive on YouTube, as you have a lot of questions that are answered there. 
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Zero jitter. 
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I agree with your underlying point about a DAW often being a flaky source of MIDI clock in a hybrid setup. The fix there is (usually, IME) to add a hardware clock like ERM/FP Multiclock or Nome 2. But with an external clock device, transport controls can be configured to be controlled from the DAW; the external box sends clock but it does so in the background and all the playhead functions come from the DAW itself.
AFAIK itâs not possible to decouple MIDI transport stop/start from MIDI clock in the TR-1000 (I checked the manual, if I missed something and Iâm wrong then I may reconsider). I donât want to be forced to use the transport controls on the TR-1000 to control my entire setup.
Separately, my experience of Elektron gear in a pure hardware setup is that sync to clock is extremely tight (around 1ms) with no perceptible jitter. I would consider Elektron as a benchmark in that sense (well, excluding the Tonverk for the time being, anywayâŚ)
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I updated to the latest Cirklon beta and more recent TR1000 firmware, and the prior issues I had with syncing are either more intermittent or have been reduced to being barely detectable. I am considering hardware midi clock, so Iâd say you may be in the clear, of course, depending on other aspects of your set up.
But it seems like there is enough variables to hold off if youâre expecting the machine to be perfect out of the box.
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Yeah, Tonverk needs to do more homework. Itâs the one instrument I do not regret returning nor anticipate ever owning again.
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I think for producers like you with similar use case and priorities, the 1000 is not a wise purchase. The external sync / slave issue is likely not going to go away any time soon imho because Roland explicitly acknowledged the issue in the manual. This means they spent time with the issue, they knew about the issue, and this is the best they can do.
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Fair point, although if anything I like when hardware takes over transport if itâs going to be the central focus in the session. Iâve avoided getting a multi clock type solution so far, have always managed to get by on a combination of midi, overbridge, cv clock, plus bitwigâs compensation/latency tools and not being that fussy about this stuff once itâs within a reasonable margin. For sure if youâre already committed to a sync solution thatâs the way, although it looks like that should be able to manage the TR as slave. I guess possibly using the TR as master for the DAW might be more niche than that - especially seeing as nobody seems to be doing it that way so far, it just seems like the option that makes the most sense for my setup.
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hey owners syncing externaly with the all tracks setting.
when running externaly clocked and you turn knobs or trigger sounds on the tr-1000, do they have a 50ms delay? or does it just have to have a -50ms clockshift and all is imidiate when working the knobs and fader?
is there a difference in how the machine feels in case of responsnes in the various options?
Unfortunately itâs looking that way.
I also recall a latency issue with the ACB on Roland Boutiques that had stuck in my mind when the TR1000 was released. Quick search and just found this thread:
https://www.forums.rolandclan.com/viewtopic.php?t=53074
Roland Quote:
âOk, I have had a reply from Japan, and they confirm that this is the specification of the ACB technology.
There are no plans of any firmware update (or even if it is possible) unfortunately.
Sorry that I could not give the outcome we wantedâ.
This is my concern too. The fact that they need two modes and that itâs documented in the manual and an âImprovementâ is mentioned in the firmware update.
They know about this problem and are making excuses for it.
No other piece of gear Iâve owned has been this latent or require two different modes.
Iâm hoping it was just rushed for release and they can properly optimise it.
However theyâve apparently been working on this for 3+ years so who knows??
Anyway I did my final testing today as it was decision day for returning. Instead of recording, zooming, measuring etc. I used the flappy things on the side of my head. It felt tight enough to me and it was in perfect sync with my sampler playing the exact same sequence using the same sounds but sampled from the TR-1000. When I flipped the phase of the sampler they were pretty much cancelling each other out.
It stays.
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I think someone should really show Roland what they think of it, especially someone who already bought it from Thomann, and let us know when he returns it so, someone else could snag it as a b-stock to test the midi latency again! 
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External Midi Clock Sync All tracks sync mode : The machine feels than sluggish. Not nice for a Drummachine.
External Midi Clock Sync Layered Gens sync mode : Latency down from 53ms to 7ms. Machine feels good, but all triggered Samples are internally 8ms behind. Drumloops are off for example.
Internal Midi Clock All Tracks mode : Machine feels good. But it is outputting a wonky Clock. Not useable as a Master Clock device.
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External Midi Clock and All tracks mode ?
Got the final reply from Roland about the audio gap;
It is written that;
The situation of the audio gap is âgood as it getsâ currently.
Devs are actively working to improve this situation on the incoming updates. No promises can be made if and when the audio gap can be improved or not.
As I wrote earlier and expected - it is best not to expect any update on this.
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âAs good as it getsâ is a bit of a cop out. Why didnt they mention it in the manual?
it is mentioned in the manual.
If you search for âsilenceâ, it should come up.
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Ah theyve updated it. okay.
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Nope, it was all immediate (using midi cables to and from cirklon)