Was just about to come on here and post this. I've got 5 jumps out of the Perris jet (while it was still flying).
Interestingly, all the DB Cooper stuff was one reason Perris shut it down. It cost them an inordinate amount of money to get through the red tape to be able to allow sport skydiving out of it (courtesy of the 'Cooper Lock' modifications), that once the engines came due for maintenance, they opted not to throw more money down the drain. It was a sad, sad day for the skydiving world.