I just re-glued my 20's with the PL premium. I let that stuff cure for about 60 hours before I re-installed the drivers. Aside from the odor this stuff is great. Both of my backs were loose and one of my fronts so I just did all the seams. Soon I will be taking my components out again so I can sand and refinish the cabinets since they are made of wood and not mdf...KUDOS! I used gasketing tape purchased from parts-express since gaskets aren't available. That stuff it great but I wish it was 1/16" instead of 1/8". Now I can listen to music and not some awful harmonic buzzing. I just set up my system yesterday, now I need much adjustment so I can finally hear these how they should be heard...Somebody call the roofers cuz i'm about to blow the roof off!
p.s. By the way it looks just go and get the exterior dimensions and subtract 1 1/2 inches to h,w,d and that should give you interior dimensions