I found this little widget that solves the 'to slot or not to slot' the soundboard (lid) quandary...
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a truss rod wheel adaptor!
Only problem is, the hex on the nut is 5mm and the hex on the wheel is 4mm, so i figured I'd just buy a new nut with a 4mm hex.
But the thread on my trussrod is M6 and all the nuts i can find with a 4mm hex are M5.
And I'm struggling to find a truss nut with the wheel in M6... so am now reluctantly toying with possibly gluing the two together
Epoxy is the obvious guess since there's a good half mm gap to fill between the hex fitting and socket... but I'm open to suggestions.
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The nut, when just engaging with the truss is flush, so I'm supposing I'll have to make/leave a little playroom for the wheel... but how much? I've never really touched any of my truss rods but I'm guessing I won't ever need more than a couple of turns on that nut??
Q: does the nut even wind in at all, or is the rod being pulled through it??
edit... instead of glue, i'm gonna try this:
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an M6 threaded connector that's 25mm long and 9mm dia. (same as my current truss nut) with a hex screw in the end.
initially i thought an M6 grub screw glued into the cylinder would work, but they have a 3mm hex... and cap screws have 5mm but luckily countersunk M6 screws have a 4mm hex, albeit a shallow looking one. Can't see why it won't work... but i am making it up as i go