Coming in late. But since working with repairing both guitars and basses dime a dozen in music shop. I've come to the law of devils, or murphys law, if something can go wrong it does. I e the amount of Gibson Les Pauls that has come in for broken headstocks overwhelms even the copycats designs. I e thus, the more set neck, or neck through, the more CURSED it seems to be to end up with a broken headstock, and of course, almost impossible to repair, or at least not without major surgery. I have to leave those to luthiers. Those with bolt on necks seems less prone to this, or aren't as much cursed. It's almost like "accidents waiting to happen". Of course one can fix a broke headstock on a bolt on bass, but I've never ever recommended this to any user, but recommended swapping out the neck instead. No old pre-CBS has crossed my bench where a swapped out neck would've been totally out of question of course.
I mean, it's much easier to repair a broken headstock anyway on a bolt on neck, since you can take it off. Fixing a NT or SN leaves you with handling the whole of the bass all of the time. There ARE subtle differences in tone but mind you that it's barely detectable and may only be so for the one who plays it. If a bass should be 2K more expensive you should have built in insurance to it, but there more often than not isn't, that the inevitable neck reset WILL OCCUR in the future, it's just a matter of time, but it's ususally within the 20-30 year span for a high quality boutiqe bass. The "inevitable neck reset" will occur too in the future for bolt on necks, but that you can do without significant labor or costs, and you can even swap out necks easily for yourself without having to leave it for a skilled luthier with "steam" machines to bend back the neck and so on.
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Regarding the sleek design joint for easier access at the upper frets beats me. These days .Strandberg* guitars has these thick Trapezoid neck profile called "endureneck" that are MORE ergonomic than usual neck profile. Guess what? Well the feel all along the neck just as thick as when you happen to bump into the bolt on neck joint on a bt neck, but without the feel of the steel. The endurneck seems to get more and more praise for ergonomic and reach the upper frets anyway.
I find it - for example - very odd, that the screws for any neck has to appear wherever the body starts and ends. You can do as SCHACK does with their CNF system, covered neck fixing system, to produce a smooth transition behind the neck profile and the body part. And still make it easy repairable. The trick of the trade is that the neck carries on way into the body and the neck "bolts" are visible when opening up the neck pickup cavity... and are screwed FROM ABOVE or routed from the top of the body. Ore screws and screws, they have a metal plate mechanism instead...
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Oh, BTW, they are 2K USD more than almost any other bass out there...too...
But since hunting or chasing or nailing that neck through sound on a bolt on neck isn't my priority at all, I still choose
regular bolt on necks, any day any time. Even boutique Dingwalls do bolt ons all of the time.