Tube rolling and SAC Glowmaster KT88?


I just received my brand spanking new SAC Glowmaster KT88 today and am mightily impressed even straight out of the box. I fully intend to settle down and enjoy it for the time being but was wondering if anyone out there had tried rolling the stock tubes out for something else and if so with what effect?
Thanks in advance for your thoughts.

Copland CDA822 (Trichord clock 4 & NC PSU) SAP Relaxa 1
Homebrew Origin Live Ultra Turntable, OL Ultra controller, DC200 motor, OL Silver Mk2 arm, Ortofon Kontrapunkt B, Whest PS.20 & MSU.20, Townshend Audio 3D Seismic Sink
Chord DAC64 Mk 2
Audio Experience A2 SE (Mullard CV4024s & E182CCs)
SAC Glowmaster KT88
Northcreek Pegasus Standmounted speakers
Partington Ultima stands
Zu Audio Libtec
Interconnects Zu Audio Varial XLR, Artisan Cables XLR, custom solid silver RCA cables
Power cables Missing Link Cryo Reference & Zu Audio Bok
128x128mghf
I received my Winged Cs yesterday and plugged them in only to find that despite ordering a matched quad, one was severely off and I was unable to bias it whilst another was just alarmingly off, two were spot on. I suppose I would never have known if the Glowmaster didn't have the LCD display!
Consequently they all went back and I probably won't be able to play until next week now when the replacements arrive (fingers are crossed for a Saturday delivery but that really would be the triumph of hope over experience!).
Thanks for the tip about Jacmusic.com Hiker, I'll check out what they're offering whilst I'm in tube limbo.
I have put a few hours on the "C"s now and I'd have to agree with you Hiker, they have made a great amp even better. Better right across the frequency range and a soundstage you could almost step into. Thanks for your advice, it was much appreciated.
That's fine. Glad you liked them. If you've only had several hours on them, bear in mind that after a good 50 hours bedding in time(in my experience) they will sound far better.

Did you persue the NOS 6N1p's?
Hello,
It's been a few years,  what are your impressions of the Glowmaster KT-88 now?  Reliable?  I'm considering it for my system.  Any comments would be appreciated
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