The SMD-340 drives work great on Amiga. I have one installed in A1200 MagicBox. Here is a blurry screenshot of jumpers taken from my video. You can try to match the jupers with my drawing. I don't have time to take the apart the system, but for sure one jumper is set to DF0, the others I'm not sure. I stuck a jumper table paper on top of the drive so I will not forget how I got it to work.
BUT there is one major thing you need to do is to jumper the PIN2 to 34 on the floppy cable, with out it it will not recognize the disk change.
Maybe in the near future I will disassemble the system and get a more details.
