Sorry, but when I build a bolt on, the neck doesn't come right off when I take the bolts off. A good bolt on neck should have a snug fit. If it doesn't, the neck pocket to neck heel joint wans't matched properly.
Now that doesn't say that gluing in it is a good idea. I think think that wood on wood is better than having glue in there.
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Every guitar a customer has brought me thus far with a bolt on neck, the pocket has been far looser than a properly constructed set neck. There are a couple good reasons: One, the neck pocket is bigger to allow for finish thickness on the sides of the neck heel and the walls of the pocket. Second the neck was not made for that specific guitar.
I have seen this over and over with Fender, Ibanez, Jackson, and numerous others. An American Telecaster I have in the shop right now has 1/8" thick polyester in the neck pocket!
Rule of thumb: If you can shift the neck left to right while it's in the neck pocket, then the pocket is too wide.
I'm in no way implying that Warmoth builds a substandard product. As a matter of fact they are very nice. I am certain that they would leave a neck pocket with enough space to allow the customer to apply finish to the neck and still have it fit.
-Doug