I had an annoying experience with Cyclone Analogic too.
I bought my TT606 used, and the BD, SN, and TOM vol pots had a weird issue where they would crackle quite loudly when being adjusted, but it wasn’t just a dirty pot; it only happened while these voices were making sound. If you adjusted the levels while those tracks were muted at the sequencer level, it was alright. It was annoying but I worked with it for awhile then sold it.
I did contact them about it and they didn’t seem to believe me that it wasn’t dirty pots. After giving up trying to convince them, I tried getting the part # for the pots and they ignored me. FWIW I was not impatient or rude in any way about it. But after that I’ve had a bad taste from them. And their products don’t quite nail the sound. I’ve also had the TT78. The sequencers are quite good in theory but I hated those rubber buttons.
The TD3 sounds far superior to the TT303, and truer to the TB303.
I also have an Avalon and a x0xb0x, and the TD3 surprised me by how good it sounds. I’ve got another on order