That tool looks like junk. You need something like this. They are sold by the pin size and adjusting collar diameter.
I do not know specifically.had those plates before they are real good quality. so what is your caster spec after alignment?
I do not know specifically.
I had my car realigned to GT performance package specifications for toe, camber, and caster. Do you have any caster issues after your coilover installation?
I'd give 300 a try. Similar to BMR handling spring rate. Sounds like these have similar or slightly less rebound damping than the FRPP track handling dampers, definitely less than Koni/Steeda. Ground control you can't come soon enough...Well installed the 350LBS springs but the shocks up front are having little trouble keeping up on rebound. So going to return the 350LBS and try the 300LBS or maybe 275LB?