Ok, my Teiscobird (2nd from left in post
#293633) was made with a mid '60s Teisco Del Rey
short-scale mahogany body, like the brown one next to it. The other four I made from scratch so all cavities & neck pockets were routed specifically for the 34" Epi T-bird necks.
I traced the neck heal (which actually is curved with a squared-off fb ramp) and did whatever I needed to do to the body neck-pocket to get it to fit. It appears I curved the lower wall and had to add (Bondo) on the G-side wall. I highly recommend a laser to get the neck positioned straight - center of nut to center of bridge, straight across all position markers. Because it was a short-scale bass, I positioned the bridge where I needed it, which was lower than where it was originally.
Shown in this pic is a trick I developed to find where to drill neck-screw holes on an already drilled neck heal; four same-size (as the holes) nails cut so they just stick out of the holes, and pressed against the neck pocket once aligned correctly. (with your laser) The nail peaks/points indent the wood and you then know where to drill your holes. Attaching a neck to a body is the most critical part of modding - it's gotta be spot-on. Another tip is making the body holes just a bit larger than your screws/bolts. This is for 'fudge-room' - which doesn't need to be much. (tilting the neck one way or the other side-to-side to align)
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I used recessed ferrules and wood-screws. I've also sunk steel mollies into the neck heal and used machine bolts for a dynamic neck-body coupling. The tighter the connection - the better the neck & body become one and it will resonate/sound better. There's a lot of conjecture about neck-thru or set-neck being superior to a bolt-on - but if a bolt-on is done correctly, they are all going to have a very similar unified resonance. And... a bolt-on can be repaired much more economically and efficiently. At least for Leo Fender in the late '40s - that was a top priority as he was getting direct feedback from professional guitarists (and later bass-players) and they needed to get their axes up and running ASAP if they had an issue that would have prevented them from playing a paying gig.
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The original ss bridge was just under the B-pu - the 34" scale bridge positioning as you can see is much lower on the body.
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Where the ss bridge was is where I located the Guild RI Darkstar pu -
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I later shifted the control knobs away from where I end up playing which unintentionally lead to turning the V control down mid-song live.
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A still playing it from our vid for our "Tiny Desk - 2024" entry -
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