Have been going though my new to me avenger. I thought I had a couple bad axle bearings( tires had play), but the axle set screws were not tight. Then I checked all the drive sprockets and all those set screws were loose. Got that all fixed. Are the set screws something that should always be regularly checked? I would prefer not to locktite in the set screws (should degrease threads on screw and gear then a pain when you actually want to take apart). The other option I thought of is two short screws one for a lock. What do you guys do? Also the front drive axle gears do not have a set screw, the parts breakdown does not show them, is this right? Thanks for any info!!!