Re: moving stuff! The weight of big power transformers + OPTs can be insane at 81 years old. But my SET TU-8900S is half the weight of the Pass Labs XA25.
I find it interesting that more hybrid leaning systems are tube pre + SS power, I do not have a "modern" tube pre to try this with - at least one that I can lift. There is a CAT SL 1 Mk II sitting in a box, just needing a pair of 12AU7s, but my back could not allow me to try to lift it!
The "keep it pure" up front then roll tubes to color the sound in the power amp seems to work.

