501 front shafts & hexes

[Belsten]

I was wondering if anyone else has encountered the same problems as I have for the last 2 meetings. 1st one is that a front wheel nut coming loose despite me running hot bodies serrated wheel nuts. Should the tension be checked before every run ?
Secondly, I am having one of the cvd pins coming out of the drive shaft every couple of runs even though the grub screws were threadlocked in.
Any help would be much appreciated