Hey guys; I recently purchased the Cen colossus 1/7 scale truck, and this morning I took a few minutes to enjoy running it before work...well, after 10 minutes of running it, the set screw on the motor pinion gear came loose; and this is not the first time; it happened last week and I put blue thread locker on the set screw, but it has indeed come loose again! Should I put red locker o the set screw, or not? Our local hobby shop owner said that they don't even stock red because of not being able to free up the screw for maintenance after it is applied; what do you guys think I should do?