Capacitor and tube upgrade for Von Gaylord Lad L-2

So far, I'm liking the overall tone and timbre, but it still
hasn't opened up for me. I also bought from Ray a 7000s
power cord, so that also needs to break in some more. I have
the power cord hooked up to the fridge to speed up the break
in. The box in the preamp that contains the caps, etc. has
two screw heads deliberately stripped by the manufacturer to
prevent any viewing. Ray told me that in order to upgrade
caps, one must upgrade to next higher preamp in the line. I
just ordered a pair of Psvane CV181T-II tubes so I'm anxious
to hear if they improve the sound. The current stock tubes
are Ruby 6sn7 (I think these are made by Shuguang)
One tweak that I did do and highly recommend is I replaced
the 1-amp slo-blo fuse with a Hifi-tuning gold slo-blo of
same value...huge improvement in clarity and dynamics. I
have an extra pair of both Eichmann and WBT that I might
replace inputs and outputs. I have replaced the inputs and
outputs on my Cdp, previous preamp and tuner with these and
noticed marked improvements.
Addendum: Another tweak just done: replaced male AC plug
on 7000S(Hubbell 8215c with Wattgate 330i)...much better
tonality and timbre.

Thanks, I'm going to try a Synergistic Research SR20 fuse. I've had good results with Hifi Tuning and Furutech in other applications, just never occurred to me to put here!

I'll have to try the Wattgate plug too. I like the 7000s cables a LOT and would love to see them perform at an even higher level.

Please let us know how the tubes worked in your preamp . I have that preamp also .