Any of these open source DIY projects would make it easy to drop in your choice of keyboard, no?
It definitely looks like with this one at least you could make it ortho
That would be amazing - like the framework laptop diy edition and you can customise the keyboard part and the hinges or something and run low profile mechanical switches in whatever layout you and keymap you want
Yea with the framework it's very much doable, but I myself am not that good at this kind of DIY. I have done assembling and soldering on mechanical keyboards, but the parts were already designed by people who know what they're doing.