deskthority

Thanks everyone. I'll investigate your suggestions further.

How about a PS/2 gaming keyboard?
I think I have some in the loft, but it's kind of straying from my mission to modernise my desktop!

Another option, though pricey, is Hasu's programmable USB to USB "converter", which runs TMK.
It's ...

Would it be feasible to connect a gaming keyboard to a controller (Teensy? Raspberry?) and mangle the keyboards collection of HID devices into a generic USB Keyboard device??

Background:
I really want a QMK (or similar) ready 113+ key custom keyboard with backlighting, but I don't have the skills ...