I am only loosing pressure when i turn on my radio. If the model sits with wheels down and radio off I can pressure up tp 100psi and it holds that presure but as soon as I turn on my radio the pressure drops to about 80psi and then stabalizes.

I have programmed the Jetronic valve to switch off pressure to the cylindersafter 15 seconds with either gear locked up or down and then I try to repressurise the system with radio on butit will not hold 100psi which is the minimum you need for retraction aftertake off. It will cycle at lest six times in a static situation.

I have a leak somewere so I hope my mods cure it.

Phil.