Guys, last week I was at TRU (large toy store chain), and I saw these flame orange plastic ramps in the clearance area for what ended up being $1.98 after all the clearance calculations at the register http://www.amazon.com/Wheels-Dual-Ac.../dp/B0002TTB18
They are made for a toy called a "FlyWheel", which is something shaped like a car wheel/tire you start spinning on a handle, then release it and it goes over these jumps.
Anyway, I used them this weekend, and they are PERFECT!! one side is awesome for height jumps...I went about 6-7 feet, since I still don't have backup parts, onto grass, and landed on all fours. The other side is alot steeper and causes a perfect back-flip! They are rather flimsy, which makes them perfect for this size RC...you may be able to use them with 1/10's (might have to double-up for strength)
I made an obstacle course and my 5 year old son and I had a great time all weekend with the ramps!! I originally planned to make ramps out of light plywood, but for $2 there is no more perfect ramp in the world (the link shows them at $10 retail, but they were around $5-$6 before discount, which is still a good price)....and no, I don't work at this store