You can also buy the parts from the bar-tek kit separately, they have a thermostatic plate. I don't see why you'd need spacer plates, I think the issue someone had was using a different cooler (which needed to be spaced out to fit their lines?).Question for the guys that are running the modified RL kit. I'm trying to figure out the best way to add a thermostat to this set up, replace the sandwich plate with a thermostatic one or just splice in an inline thermostat from Improved Racing? Seems like there are spacer plates needed if replacing the sandwich plate with another company?