Mods for a PS Audio HCA-2?

I was intrigued to come across these comments about the improvements the mods make, because they sound like what I might be looking for. I've owned an HCA-2 for a few months now, and while I don't regret the purchase -- I'd find it hard to go back to a conventional solid-state amp now -- I've been bothered a lack of body and texture in the mid-range and upper bass. Sort of a thinness or hollowness.

Using a PS Audio Statement interconnect between the pre-amp (Marsh p2000) and amp somehow seemed to help to fill in the texture a little, but I'm still looking for more. I'd appreciate any further thoughts on what I might try next. Have other HCA-2 owners found the mods to solve the kind of problem I'm having? Or should I try other things first, like a different power cord (right now I'm using a LAT)? For the record, the rest of my system comprises an Arcam CD92 and Thiel 2.3 speakers, with Acoustic Zen Matrix Ref IIs between the CD player and preamp, Acoustic Zen Satori speaker cables, and a PS Audio Ultimate Outlet to the CD player.

Thanks for any tips.

Well, yes, the Thiels are certainly what I would call a cool sounding speaker but I did hear more body and warmth from them with other amps I auditioned. It's just that the HCA-2 was so good in other respects, and especially in avoiding the hardness and greyness of other solid state amps. I'm hoping that the things I'm not so happy about with the HCA-2 are not due to anything intrinsic in the design but can be tweaked away somehow.