@ 3246251196
Never used that interface, but as those keyboards were ("were", because I'm out of stock for a long time already) genuine A4000 keyboards, they should work with every interface designed to work with A4000 keyboards.
@ davideo
Seeing that 1 year after my close request, not a single additional feedback (positive or negative) was given, I'd wager to say this sale thread is really EOL and can be closed now for good.