I have had my bass about 5 or 6 years so far, and so far have not had to deal with anything around the sound post. However, from everything I read, it seems like sooner or later everyone has a sound post drop. Plus, people are forever experimenting with sound post adjustments. Rather than doing the ship in a bottle thing, it occurs to me to have an access panel installed. This is what I would think of as a "medium-quality workshop/factory bass"; a Romanian no-name, probably from the Gliga factory, all carved. Most important question would be: Are there any defined negatives to having a trap door? Other than possibly affecting the resale value, I mean.