Trainer I could see. The ergonomics of it made me shudder to look at a bit, but that sort of thing could be addressed without too much work with a 3d printer or even some woodworking I assume.

I have one of these. It's be pretty easy to wire those buttons to it.

cwmorse.us

Red Lightweight Double Paddle With Steel Base

The Ultimate Lightning Fast Double Paddle Morse Code Key. Super Smooth Action With Dual Precision Self Lubricating Nylon Bearings. Solid Brass Con...