thanks for the reply greenpants, I have ran the 230 test a few times both velocity and ppt test and every test is right on the money. I have swapped every board in the controller plus power supply with another car. the bottom floor is exactly 00A0. I was on the cartop repairing the initialization switch as it would not make up when car was above the bottom floor, causing car to initialize up on a POR. the roller was there and the tm switches were opening fine at the bottom. I thought i was on to something after fixing the initialization switch as the car ran 10 days before occupying into the pit on a down run. Here is something maybe you know about, I was researching the manual looking for a clue when i came across the 40 test for the test log. I reset the log, and after it went occupied i looked at the log again and noticed FE64, PCF was at 35 counts, and FE74, VMODE5 was at 35 counts since the log was cleared 3.5 days ago. PCF position control failure? there has been no complaints of car acting up except when it goes into pit, but 35 times in 3 days and 5800runs indicates something is up. could it be the ppt is intermittently failing. or is this a result of VMODE5 which i cant find any info on.