hi guys, i've noticed that i can get a 2 speed for my hyper 7 and am currently considering buying 1 basically for a bit more top end fun as my hyper7 has loads of torque from the .28 and in a fairly light chassis. what i'm unsure about is that i've heard from various people that 2 speeds have problems especially once the change from 1st to second that they easily snap 2nd gear. Is this true or only happens to the $100 off road buggy's found on e-bay?