Hey CaptainBob, do you use single or dual "master cylinders" inside the plane?

A couple of other points, someone said side loads on the cylinder causes leaks, they are right!

Second, I found some very hard 4 mm line that I am sure will swell less than most line, especially at 100-125 PSI, but I can't find the link....it was "something "95A" which I assumed was like a Shore rating on elastomers. Rigid line would help too but it is fiddly to bend up.

Seems like if you get a bulletproof way of bleeding it and then it does not leak (letting in air) it would work much better.