Hi there PC,welcome to TPF, I did think of it, but could not see any obvious points to hold it, what do you have in mind ?
I also broke this one, so when I get round to it, I'll be building another involving an Aly, or Carbon Fibre arm which does not need the wheels, one thing I dont want to do is use suction mounts on the bodywork, as some of the cars I'll be working on a rather pricey. I dont want to risk damaging them and also I want to get as much as i can done right in camera, I'm not keen on photoshopping large area's.
I'm interested to hear whatever you may have in mind, and how for along you are in your planning ?
Cheers
Kris