I once enlarged some OMP plans, and scratch built a yak for a gas 25cc engine...Built the plane.. took it to the field, and it went in on the second flight.. I lost all radio.. I was so disgusted. As I tore it down I found out the BRAND NEW RECEIVER PACK was so poorly soldered on one wire..that when it broke off, the solder was only connected in an area about the diameter of a push pin needle. I was so sick....

It was like I had been sabotaged by an enemy.. It was a tough one to take.