I hope this is the right forum to ask you guys this question. I just got an acoustic bass in today. I can't justify the cost of a Thunderchief, but this import little brother looked like it might work. As soon as it came in I threw some flats on it and it sounds great. But... While changing strings I noticed a slight ripple in the top on either side of the bridge. After looking closer, I can see and feel that these ripples follow the bracing inside. The whole thing feels solid and is holding the tune just fine, but I've never owned an acoustic bass, and none of my flat top acoustics have ever been uneven on the top, so I don't know if this is a problem or not.
The two photos with the black lines are my bass, trying to point out what I'm seeing/feeling. The other is the same model, but one the CME was or is selling (I got mine off someone else on Reverb). For any of you who may be familiar with these things, is this something I should worry about and possibly return, or is this normal/acceptable?