Ok, got another reply from Tom after I sent him a copy of the Amiga Reference Hardware Manual (as advised by Toni).
His verdict is that only a small change to the circuit board + a possibly aditional firwmare update are needed for his adaptor to support my analogue Speed King (and with it every other Amiga compatible analogue joystick too!!!).
Basically now waiting for this to be completed and the deal to be made, but once I have the adaptor into my own hands and tested everything to confirm a fully working status, I'll come back and advertise this louder on EAB, as the only USB adaptor in existence supporting Amiga retro analogue joysticks is bound (ain't it?) to attract a least a few more maniacs like me here...
