might set it up on the bench and with a gauge on the output to see if i can get it to hold a steady output from a varying input, with more pressure on the input side, but i suppose when the car coses on boost teh ammount of back pressure against the actuator increases hence the reason why older weal actuators cant hold boost so i guess it would be quite hard to test other than on the car.

i know how mine is plubed up at the moment gives me what the chip needs/wants.

so i suppose i could just remove the wastgate and compressor nipple connection , reconnect the manual one in and play safe in teh knowledge i can go back to a working system wheni want to.

dan, as you are running a p8, you should be able to run closed loop boost anyway, all you need is a boost contol solenoid like the esocs lectron valve (and the jetted T piece)