Hey Mark,
Gave the Stage 5 5 Port it's first race outing last weekend. SWEET

Even though it's still a little tight at 26 tanks, it was plenty fast

I was well impressed.
Tuned it in the morning and just left it like that all day. Ran faultlessly. All I got to do now is try and keep all four wheels on the ground under power

It's going into a much lighter XRay 808 in about a months time, so that will be fun
In the process of running the 7 Port back in with your Stage 3 sleeve fitted. Only found time to get 1 litre through it so far, but it's shaping up nice too. It's going to stay in the CL-1 and make up a nasty play / back up race car.