Anyone modded a Steelhead?

Besides rolling the tubes,which I've done,has anyone swapped out any caps (which ones/where ?)or done any other modding to this nice phono stage?

I run mine directly into my power amps(tubes),but I feel I could use a bit more fullness.
What I don't want to do is run it into another pre-amp, there's just too many wires and circuits to contend with to my way of thinking if I went that route.

I should add I did upgrade to a HiFi Supreme fuse and this positive experience leads me to believe there might be some other parts in the Steelhead that could be improved.