SUT With a Manley Steelhead RC?

@lewm- Yes, the Veloce unit I own is a line stage and it replaced the Lamm at the time.

I do remember the tweak/mod you described from an earlier thread here but your saved summary is helpful. I don't know the internal differences or running changes in the Steelhead.

Never had a gain issue as far as I could discern-- to me at the time, the unit sounded a little spare, lean. I remember when Six Moons reviewed the Steelhead and the writer had a grounding issue. I wrote to them at the time (dunno if the comments are still attached to the review) about how to solve it. Did have a discussion with Eva at around the same time-- she believed "less was more" by not having the additional electronics. I think it is all system interdependent. As I recall, I was running the Lamm ML2 SETs which are still my main system amplifiers. It was around this time -2013?- that Alan Sircom came to visit; we had some lovely bone in rib-eye steaks that I grilled and a few hours of listening. Alan did a nice write up in HiFi+ at the time. 

..."the unit sounded a little spare, lean..."  In my experience, that sonic character is very often associated with marginal phono gain, and when higher gain is provided, the coloration is ameliorated. But if you are saying it sounded lean even after you inserted the Lamm, then all bets are off, except maybe you were hearing the Lamm, which after all is another device in the pathway that could potentially introduce its own sonic character.  On the other hand, I am in no way saying the Steelhead is flawless.  However, it sounds a whole lot better post-modification.  I am now thinking of upgrading the attenuator, but I hate to give up the luxury of the remote volume control.

Nope Lamm did not make it lean, just the opposite- put more meat on the bones, though the frequency extremes were rolled off compared to the Veloce (line stage comparison). As to lacking gain, perhaps that was an issue. It was a couple of iterations ago- sonic memory is imperfect, just remember the processes I went through. The mod you did seems to make sense. I did go back to that Six Moons review- it was apparently edited after the grounding issue was sorted and some newer material added. It's been a while. 

@billstevenson Thanks for your kind offer to lend me your Bob's Devices SUT.  I will let you know if I want to take you up on the offer.

Snackey, I don’t recall whether I mentioned this before, but you can have up to 65db of gain via the MM inputs, which bypass the autoformers. You might try that if you haven’t done it already, before resorting to a SUT.