question regarding slight deviation in enclosure sizing

[manbeer 0]

Working on some fiberglass corner enclosures on an upcoming build for someone and i noticed that the corners that they will be installed in are slightly different. since i was going to begin by making the backs to rest perfectly flush i am wondering if having slightly different airspace for each side, say .1 of a cubic foot. would cause problems. I would say the left box will be about .9 sealed and the right would be about 1.0 if anything. should i add an extra piece of MDF to the bottom to compensate? i didn't know is the different Fs would cause some type of clash in the response

[ABXX49 20]

I can't imagine 0.1^3 ft would make an audible difference. I could be wrong though!

[///M5 2,833]

I doubt you will notice, but conveniently if you do it is an easy fix