I recently traded a guy my cheapo coilovers (plus a little cash) for his skunk2s, however he did not have the round pieces that sit ontop of the springs, (betweeen the springs and rubber/plastic cap which has the studs/grommet for top of the strut) I kept the ones off my cheap coilover setup and they look very similar to the skunk ones I've seen, so should I use them?, or not worry about it, the spring diameter is very similar for both setups, and I currently have them in my car with out the caps and they seem to ride/preform fine...