Ran a heap of tanks through the 5P at the track on Sunday. I ended up using a 7.5mm intake restrictor to help get engine temps up. It worked well, and i had the temps up around 120C, i was very surprised how little i had to adjust needle settings with the smaller restrictor, and even more sow how much power it had. I love these engines, cant wait to get a 7P added to the collection...