Hey i have weapon-r super tuner coilovers and JCW is having a crazy sale on KYB AGX, so i was wondering if i got the kyb's would i have to grind the perch? I don't have alot on knowledge in the suspension category, so what is the perch anyway? Is it the part that the springs sit on, that has like a groove in it for the end of the spring? If i need to grind it, how would i do this? The sale is real cheap, is it worth it? Also is it hazardous to grind the perch, will it effect the shocks in anyway? Sorry about the long post. Deze