I am building a Tamjets F-16 and have had all sorts of issues related to the landing gear functioning properly.
To make a long story short i have 2 remaining problems:
1) Nose gear is giving me a hard time as it doesn't unlock unless you give it a little push. But the weirdest thing is that when air tank is almost empty it unlocks although the main legs have no sufficient air to unlock. I have tried to grease the axle and sides of the unit but this didn't seem to help.
2) Gear seem to open/close much easier while plane is in an inverted position then when it is upright... i can do several cycles on a same air tank while inverted then when plane is upright,,,
To make things even more complicated (while it is meant to make install easier, i have one main leg hit a switch valve when fully retracted to close the doors. here again as nose gear stays stuck, its door closes before hitting the extended leg...

Thanks for looking and appreciate suggestions to solve this issue,