I agree, instead of just posting a quick "this thing is good" type pf comment, you've spelled out exactly how good it is and given plenty of examples. I have also ordered one.
I build a lot of vehicles with a lot of wheels, this will definitely come in handy, especially considering the next model in my queue has around 50 wheels. I've never been a fan of compass cutters, as even when the center is marked, they can still be a bit hit and miss.
I think you need to contact these guys and see if you can get some sort of commission.