Onza t rex- My first trials bike so i wouldnt't know the good points and bad bad points but i do remember it being alot harder to throw about than my later frames. 2005 Zoo! Pitbull- Absolutely brilliant, took a bashing and was very nice to ride. Prefferred it to my 2007. backwheeled stuff good. 2007 Zoo! Pitbull stock- Good and everything but felt like i went downhill from my 05. Very stiff though and has sexy green stickers 2007 Zoo! modstock- basically the same as the other one, just that you dont have to worry about breaking hanger brackets. 2006 Echo Control- Loved this frame, was exceptionally stiff and responsive. The best frame backwheeling frame ive ever ridden. Nothing beats a control, bloody awsome! 2007 Adamant A1 modstock(which i have now)- Awsome! its main strength i think would be gapping, it just floats! definately the best frame ive had. Many people have these frames and for good reason! Id reccomend this frame over all of them.