[radiaL] midi controllers and radial

yes, it's certainly not cheap- because they're handmade in limited numbers, i imagine the economies of scale don't factor in much. i love the design though. do wish there were the possibility of adding knobs/sliders- some people have done a few mods to them, but this only adds to $$. 

how would one go about setting up multiple controllers for radial- is that even possible? i could see using something liek a 40h for fast switching functions and a more conventional knob/slider control for parameter adjustment...