For some personal reasons, I finally have access to 2 of my old guitars, a 6 string ESP Alex Skolnick signature, and a 7 string ESP Viper.

• The 6 string was full of rust, and I accidentally broke the nut, I managed to replace the rusted screws and the broken nut.
• The 7 string was okay, but I accidentally got a part of a string stuck inside the machine head. Went and bought 2 sets of Gotoh machine heads, drilled some extra holes, and replaced them.
• Also, either its humidity or because I never properly adjusted it, the strings were buzzing. So I adjusted the truss rod. The adjustment for 7 string went okay, it plays ok, the action is low enough that I can play it smoothly. But for the 6 string, it seems problematic, I need to adjust the truss rod really tight that it starts to squeak (I'm afraid it might break the neck), so that the 3 thickest string won't touch the first fret. Let's see whether the guitar would break into two by the end of the week.

Anyway, since I've been playing 8 string guitar (horribly) for the past year, my hand is now so used to the wide neck that 7 string really feels small and easier to play than before.