Stiles72 has modded his PF115 by adding rear ports from a Ampeg B100 Rocket bass amp. Another T.B.'er has been expermenting with a different, higher power handling driver for his sealed PF115. Haven't heard if he's settled on a certain driver yet. I myself (so far) have made cosmetic changes to my PF115 cabinet. I removed the two, front, top and bottom, black diamond tolex covered, horizontal strips from the grill. Took the Ampeg emblem from the top strip and installed it into the front, thicker, top edge of the cabinet. (Looks like a large version of a Ampeg B50 Rocket combo.....I love it!) I'm now considering getting 16 wood screws and fastening down the PF lid. (My PF cabinet's lid shifts in transport and I don't transport the PF500 head in the cabinet anyway.) I've located locally a used EV SRO (15L ?) driver for $45.00. May stick that in my sealed PF115 and see if there's any improvement. Anyone else made any changes in their PF cabinets?