Borgeson or Firm Feel steering?
I was doing a track day on a 9 turn 2.5 mile road course with I think 15min sessions. The fluid got hot and did not not vent enough out of the cap, built pressure and blew the top off the pump. Not the best at a hair pin turn at the end of a 1/2 mile straightaway. I changed to a type 2 style pump and added a cooler and never had the problem again. I believe Kern Dog was right behind me when that happened.