Modifications

[PRUNEFACE]

I need to get my bass setup correctly.. Just got told by a luthier (Bob Beerman, here at the double bass symposium) that it's the setup not the bass that causes a certain buzz/thwump/thingamajig on the Ab and A on the D string at the heel of the neck. So, on top of getting my (epic fail) mechanical extension removed and a chromatic (well... I'm considering chromatic. not sure yet) put on. I have AMAZING strings (Compas 180's I believe. I love the feel and tone) that I like. So that I don't know if I want to change.
But otherwise some things I am considering:

-A "block" on which I can install a Laborie/Rabbath style endpin without drilling into my bass. Any reccomendations?
-Shaving down my tailpiece OR getting a new one. It's the mammoth sized Kolstein Deluxe tunable afterlength one
-Shaving down my bridge/getting it cut down. Mr. Beerman immediately pointed out that it was very high OR getting a new one made
-A solo extension put on the end of the fingerboard
-A full setup (which I would get no matter what)

Anyways, anything YOU would do? It generally sounds great in all positions with the exception mentioned above which should be solved by a fingerboard dressing.

EDIT: Removable neck, possibly with the intent of getting a five string neck sometime in the future OR a neck without an extension. Either way... Just a possibility.

[Jsn]

I think the first thing I'd do is move this question to the "Setup & Repair" forum.

[Don Higdon]

I'm just wondering why you're asking here, when you just got told.
Go to a competent luthier for a full setup, say what you've said here, and ask him/her. Certain conditions only reveal themselves when work is under way. You just have to live with that.