The FDD worked but I cant say about the SCSI since the Dock II did not have a hard drive in it. I also never tested the Video out on the Dock II with the top off, though I remember it did work with the top on. I made the discovery of the top off hen the gear started stripping and took the top off to see how the Duo slid in. With a push with the thumbs the Dock would be able to grab the Duo and engage it and out of curiosity I opened the LCD on the Duo and it booted up like if it was not docked but AppleTalk had Ethernet, I could load floppies and Tech Tools said I had an empty SCSI and an FPU. So I worked it like that since.

Eventually the gear would grind down to nothing and the Dock II would no longer engage the Duo though you can hear the motor trying. I shelved it since then. If I can get a 3D Printer and Scanner ad barrow another Dock II to scan its gears, I could probably make a new gear set for the Dock II.