I bought the 3rd RB5 car they had made @ Petit before I'd even seen it running purely because as an engineer myself looking @ the pictures i could see how well made it was and i thought to myself 'If i was gonna make a car myself properly I'd have come up with something similar'. My wife says i stare at it to much, lol. Since getting mine i have never been so fast, in fact i won my first regional with it the other weekend.
http://www.brca-eoe.co.uk/#/results/4540543515 Scroll down to results Rnd2