Alright, I give up, I have been trying to figure out the difference in the Hyper 7's and cant figure it out. The engine differnces is a given, but what does the PCR, PBS, TQ pro, and the TQ sport have different from one another???? Is one better than the other? I have a DSM radio and reciever I am going to put in it and I have a 148oz analog servo for steering and an 85 oz. digital servo for brake throttle, are those strong enough?? Which buggy would be the best choice? Thank you for your help.