Wow i would love to rebuild my forte II cabs I can say i have add modeling clay to the corners.B Quiet to the walls and upgraded my crossovers and am very happy so far. Oh also put B-Quiet on your mids and tweets. Makes a huge diff!! Even the woofer basket got the B-Quiet.I love them and A and B'ed one to test and see if i upgraded or simply side stepped it
If you knock on the side of a forte you will notice the hollow sound. The box is coloring the sound as soon as i put the B-Quiet on the back of the horns I no longer heard highs out of the passive woofer.A good improvment.Then i added B-Quiet to the sides and no longer heard the(box sound)Bass is very tight(chesty).
I modded the crossover a few months ago with new caps on the mids and highs Sonicaps on the highs and clarity caps on the mids LOVED IT!!! but did not do the 110uf electrolytic on the woofer till last.So when that big honker of a cap came i worked hard to get it on the board but it fit(I will send pics soon)
As far as cabs go Tony Gee builds his with one inch MDF then adds lead sheets to 1/2 inch MDF with glue on the front panel and glues everything ,no screws