I use this approach to play Machinedrum patterns using midi notes on the Octatrack regularly. All the drum sounds on my MD are mapped from C-0 chromatically, and then all of the patterns are mapped from something like F-1 onwards.
Using sync, I find that the ‘double triggering’ you mention doesn’t occur if you set the note length correctly on the Octatrack midi channel. Eg; As long as the note length <= the Machinedrum pattern length then things play smoothly for me. I also use other OT midi channels to trigger additional MD drum hits on top of whatever MD patterns are being sequenced with no issues.
However - I would never ever want to go back and re-map every single pattern to a midi note again, that was boring as hell!