every time I run my 2.5 t-maxx the rear bulkhead loosens up .... I have a aluminum bulkhead and the aluminum trusses underneith, and aluminum skidplates..... I don't have to even hit anything just running it around and it will get so loose the top screws fall out

. I've tried changing screws to the allen head style .. its fustratign .

. going to pull the back completely off and see if there is crud in the joint that might be causign it .....
Any ideas ?.... the only thing I can think of is thread locker .... but easy as these screws strip ... might not be a good idea......... any one else have this issue ?