Has anyone heard a DNA-1 with the Gravity Base upgrade?

McCormack DNA-1 or (better) DNA-1 Plus - yes

Pillartech Gravity Base - why?  Do you really think it's going to make a substantial difference?

My advice: buy a nice piece of end-grain maple butcher block to fit under the amp and use the rest of the budget to buy a ton of LPs or a lifetime subscription to the streaming service of your choice.

@br3098 thanks for your response; I didn't realize I was unclear.  I was referring to McCormack Audio's Gravity Base System upgrade, which involves taking apart the amp and integrating the electronics with a brass base in a specific way.  I had never heard of the Pillartech approach, but from their website it appears to be just a more rigid rack on which to place the amp.

Sorry, my bad.  I am unaware of this offering by McCormack.

From the absence of replies, it looks like you're not the only one.  C'mon, Goners, nobody's heard one of these yet?  Crickets...

Sorry I didn't see this question earlier. I had my DNA-1's updated by Steve last summer and got one of the first base system installations. It, is, frankly, as big a positive surprise as his VRE preamp was when I bought it years ago. I've yet to hear an amp that sounds as good. Sound emerges from a dead quiet, black background and is dynamic and revealing, yet warm and musically engaging.

Thanks @jaker — I went ahead with the mod, and I agree!

@willhifi  Thanks for your update -- I'm very happy with mine, too, and surprised we haven't heard more about them on Agon.  Hopefully, the word will get out eventually!