I got Nick to do the mods suggested by Glenn. Glenn did his usual disappearing trick when the cricket started. I wanted the mods doing ASAP. You might want to have a look for my thread detailing the mods. I've since had more mods done. My phonostage is specifically modded for the RCA 6591, you might want to make sure the one fitted in your pre-amp is being fully driven with correct voltage. My EPOCH was a little under powered. I also had all the tape functions removed from my Croft. Have a look in here

https://theartofsound.net/forum/show...ht=Croft+EPOCH

Alan (Firebottle) has since modified the Croft even further with individual valve regulation. Didn't you have a tube rolling session with the small valves in the PSU? What conclusion did you come to?