If you had some, my inclusion of the CBS Hytron black plate 12au7’s changed the sound of the Trumpet, a lot. Much more air and extension over the Brimar 4003’s I had in. Along with my old Telefunken smooth plate 12ax7’s which also add much detail, silky smoothness, and clarity. Yes, the right mix of tubes can change everything.
I get it, you like the ModWright, great, enjoy.