Supratek Owners Thread

Greetings All - 
It appears that the 26-million-plus view, multi-decade "Preamp Deal of the Century" Supratek thread has been removed. I'm not sure why, but suppose there must be a reasonable explanation.
In any case, on that thread I recently asked whether there might be interest in a "Supratek owners thread" and received some interest. 
The purpose of this thread is for Supratek owners to share the details of their system, ask questions, share information about any tube-rolling they have done, and so forth.
I'll kick us off here with a few details about my system -
ancient Linn LP12 with Ittok arm, Dynavector 17D3 cartridge into Cortese LCR phono stage
Power amp is a fully serviced Innersound Electrostatic amplifier
Quad ESL63 speakers (not USA monitors) or JBL 4430 studio monitors
Digital sources are immature and evolving - ancient Fostex CR300 cd player/burner
DacMagic 100 DAC
Nordost Blue Heaven 75ohm interconnect
Due to the fairly long lengths of speaker wire required in the new listening room, speaker wire is Belden 12 gauge wire designed for low-voltage outdoor lighting systems. 
Next steps - dedicated circuit, new power cords, new interconnects, new wires.
Hi All,
I have a Supratek Cortese preamp in my system for a couple years now, 2018 build.  I recently had an issue with it that required repair.  I want to let everyone know that Mick really stands behind his products.  The repair was covered under the lifetime warranty.  I just had to send it to Johnny Slate, Mick's US tech.  Johnny was excellent to work with and now it is back in my system singing again!  Now that's customer service!
Has anyone thought of or changed the fuse on Cabernet to a higher end fuse? I am thinking of doing it. If you have changed it then can you list it here and the changes you noticed. Thanks.
Hi, I posted this in the Supratek or Don Sachs - which way to go? thread, though I would post it here also.
I got my Cabernet a few weeks ago now, very happy with the quality of construction and the sound is very good, one thing I have noticed is that after a week or so I started noticing hiss from the woofer on my Graham Audio LS 6/9, I am sure it was not there before and I sounds like it is the woofers not tweeters, have not tried the 300b output again since trying it out the second day of ownership, for me the 6SN7 output sounded better and more resolving.
Could the tubes gone bad already ?
A family member did shot down the Hi-Fi the right way, but pre amp first, which gave a small thump from the speakers, but no damage to speakers, I have noticed that I have to wait 3-5 min after my Belles SA30 class A amp has been turned off before turning of my Cabernet, otherwise I hear a small thump and sucking noises from both speakers, if waiting a few minutes everything is fine. My speakers are 87db so I would thing the amp to be totally quiet.
Will investigate in the weekend, but if anyone has any input, I would be grateful.

Congrads on your new Cabernet!
Is it both woofers? if one, swap amp cables, does it follow or stay?Try removing the tubes and cables and reinserting them...
try different cables and wall outlet