PSC Infinity is a neat two stage cluster that Semroc offers. Loaded up with two motors in the booster, and two in the sustainer this rocket should really go. The kit was normal Semroc quality, and easy to build. I used Duplicolor High Fill Primer to fill the spirals and wood grain. I had to go with a military type finish since it is way to humid to use anything else. Overall a nice result, can't wait to give it a try.