Just returned to pre/pwr from an intergrated as I was keen to try the amps that were built for my speakers. Will let things settle and then experiment with different pre's. Only a day in with this setup which was poor on switch on but the sound evolved over the first few hours and is now pretty enjoyable.
What a wonderful looking system, great job!!!! I had a Calypso and enjoyed rolling tubes it responds well. If I remember correctly there is a way to switch to minimum gain and reduce the noise floor then return to 12AX7's to increase gain.