Ok, I know this may sounds stupid, but I really want to get started riding and I have a REALLY tight budget. I was wondering if it was possible to convert a really light BMX bike into a trials bike (just to practice on) and if I decide that I like it, then I spring and get an actual bike. What do you guys think? Is it possible? Also, what is the average weight of a mod bike frame? Cheers! Keegan