I got the third spring on last night and with the third spring and it tightened all the way down it works! The front end comes off the ground a little tiny bit on launch but no more flips or wheelies and my drive train should be safe now. So I guess with 3 springs it will work good on a huge truck like the muggy. Im happy with it now. Im running a 15t pinion, 4 cell A123 batteries and a 40 x 82 mm 2000kv 4 pole leopard motor. It moves pretty good! I will try to get some video posted when it stops raining.