I'm the owner of JTV-69US and do any fellow users have tips on how to properly adjust the truss rod? It seems that I am unable to properly access the truss due to the angle. Thanks for any tips at all!
It looks like an old 60's strat set-up. You either have to remove the pickguard and subsequently the neck pick-up if the is a channel routed between the neck pickup cavity and the truss rod access route (and I'm sure there is) or you might need to remove the neck, as I normally do. Its a process, luckily you don't have to do it very often. Remove neck, 1/4 turn, reinstall, restring, repeat.