A month ago I had the pleasure of presenting my project to Commodore Users Europe audience live - including demo from real hardware.
https://www.youtube.com/watch?v=iNGW5h6bXoA
TCBM2SD is a CBM 1551 paddle replacement, mass storage device using an SD card interfacing with the Commodore C16/116/Plus4 simulating a TCBM bus 1551 disk drive. On top of that, it has a place for 64K ROM to act as a cartridge.
Contact me if you want one.