several regrets, some bigger than others.
drilling holes in some guitars in order to get some toggles for coiltap in them. plugged them afterwards, but still. nah. not a good idea.
routing 2 guitars for kahlers. locked the kahlers down, so they're fixed bridges now, but it was a useless exercise
asking for a rosewood fretboard on my first build.
I regret that I HAD to recess the pickupring on one guitar, but it had to be done cause every ring I used was too high for the guitar/pickups. I'll change the rings out for (home made?) maple rings to cover up the routing mistakes I made
buying Rivera amps. Those amps are just not my cup 'o tea. My m100 is a great amp on the first channel, the second isn't really that great for me. At least, not for that 'marshall crunch fender clean' thing. it just doesn't work that way. the rivera is all 'rivera'. smooth, sparkly clean and thick leads. nowhere near the marshall-grind...
I regret not having bought the pearly gates sooner, nor having bought a korina/korina LP body + rosewood shaft + alnico2pro pickups sooner. I regret never having given the duncan jazz a chance in the bridge position. I regret using superhot pickups for years and years, where I now prefer lower output pickups. those pickups are so much more toneful.
I regret having oil-finished 2 guitars. in hindsight, nitro or acrylic is easier, faster, and better looking. Maybe I'll refinish them.