By the way I have also installed some teflon tube sockets and I'm intrigued to know if these will make any difference to the sonics.
Bluesky
Hi bluesky,
Teflon tube sockets eh ... where did you buy these? I ordered special ceramic tube sockets from Mr Percy when I built my GK-1 but I hadn't heard of teflon tube sockets!

I'm sure they will be positive to the sonics, not negative, but it's hard to estimate by how much without listening!

Then again, it's hard to comprehend how a change to a different volume control could make a radical improvement to the sound of the GK-1 ... but the TKD stepped attenuator sure did!

Good luck with the build!

Regards,
Andy