thanks for the input. The stands were originally made for some speakers that were placed in front of some in wall registers (were the only place to put the speakers at the time) so I had to raise them above the vents. I do agree those are a little too high for bass (you can tell a difference by moving them on the floor) though I do like having them closer to ear level when sitting on the couch. Building regular risers for them is on the list of stuff to do before it gets too cold to work outside (garage isn't well heated.) Unfortunately the way the room is set up, putting them in the corner isn't an option. There's a door in two corners and a wood stove in a third.
The boxes are pretty well sealed with foam tape. No noticeable air leaks have been found.
They've been recapped using some Dayton caps. I've played around using different brands of caps on other speakers but can't say I've noticed any difference so I went with what I already had on hand rather than order some (replacing them with better caps is an option in the future if it would make a difference.)
I've got the speakers hooked up on a vintage solid state McIntosh system (C26, MC2105.) I've also got an MQ-101 environmental EQ hooked up for some McIntosh speakers and that really helps on the low end too. I've hooked them up on my tube system but honestly, the tube system is so detailed on the highs & mids when combined with the Heresys its almost too much. But you can hear hints of very deep bass on that system you don't get on the McIntosh, but its in a different room set up all together and they are in corners there...
Edit: I opened one up tonight and noticed I used Jantzens not Daytons, not that it really matters.