Is there any Unison Research Performance owner?

I would like to share some experience about tube rolling etc..but I think there is
not any owner this SEP class a integrated in US or Audiogon?
I have a performance sic 3 monthes and I love this amp. I really think I never change
For the moment I did not change the valves but have mullard, electroharmonix
In some monthes I wil try to change and you?
I have owned for a few weeks. Put in GEC KT88 and improved sound by 20% over stock o/p tubes. Down side they cost so much.
Maybe better to spend that on SACD's.