Called redcat and they confirmed it should be 5mm from top of head. He said something probably caused rod to stretch when it locked. In that case, where can I get parts? They would not be able to repinch at this point if rod is stretched would they? I have been removed from RC so long, it's like starting over regarding finding who to call piston, sleeve and rod all look new. Thanks in advance.Once it gets beyond that pinch point ,there is no way that it would run properly & tune!
If the piston /sleeve still looks good ,an is smooth ,you can send it in an have it re-pinched
for $ 20 bucks + $ 10 for shipping ,which is well worth it it!