So, the one screw that's seated in the flat groove is no longer seated in there and loctite is holding it? If that’s the case, then when you look at the two screws on that collar, one of them is out further than the other? I hope you don't loose your tail, but I guess it also depends on what type of flying you're doing.. Good luck with that mod.
Dap at the tip will go down to the shaft
Dood, If your boom push rod is deflecting almost an inch on spool up, you got to check that tail hub.. I'll bet it's off center.
Mine will bow almost an inch at the unsupported middle if I hold the right (wrong!)rpm...
Also, I found out that IF your tail has that type of vibration, the plastic that securing your tail case bearings cannot take that kind of pounding and it widens up, which causes more tail output shaft deflection.
I had too much RPM on mine last weekend and those stock tail blades just could not take that kind or RPM and I threw a tail blade. Just a reminder, I had NO tail vibrations after straitening out the Hub on the shaft. Every thing was running SMOOTH as glass.
When the blade was thrown, the offset vibration caused the tail output shaft to bend.
I landed it in the grass. No other damage than my canopy got a bit beat up.
Long story short – When I put my Bearings in the tail case, it was a snug fit, and I check them before each flight. I just try to wiggle the tail output shat to see if anything was getting loose. Well, when I went to check it after the thrown tail blade, the bearing closest to the tail blades now can fall out of the tail case, if the large gear was not there.
If that can happen in 1 flight, image what will happen over time with a wild vibration.
Oh, - One more thing..
The screws that secure the tail blades to the grips, should have a shank on them. When looking at a blown up photo of the screws, those things are like miniature saw blades digging away at your plastic tail blade roots. I modified the two on mine with some JB Weld to create a smooth surface for tail blades to ride on.
Gravity Hates me..