I am so sick of my 360's landing gear NOT retracting after taking off on a
hot day.

I've:
1. Rebuilt every single gear cylinder (some twice) and had someone double
check and pressure check the work
2. Replaced the dump valve
3. Checked for leaks

I give up.  I've installed the newer legacy dump valve that can return to
the pump reservoir, but I haven't yet run a line from the valve to the
reservoir.

I was thinking of using tygon.  

1. Is there any problem with this?  I can't see why there would be - no
pressure
2. Does anyone have about 8' of the stuff they aren't using and would ship
me for cheap?

Thanks,

Matt