I did'nt think he was either. But you know that only the high end amps now actually have hard wood cabs. In Fender its only a few of the very top ones. None that I know of in Vox after the handwired series, or marshall ect ect.. I think that the hybrid type of amp for guitar would be perfect though for Kustom and just retain the entire amp as designed by Ross other than that.
A single 12ax7 would then just take the place of the of the harmonic clipper. Then we would still have the rest of the Kustom circuit intact. That would still give us that great Kustom clean sound with a tube overdrive as needed in the preamp section. Use a single 4x12 cab for them or two 2x12's.
I'm sure too that the original preamp section could still be retained and just hooked to a more powerful output stage for a bass amp. That way our Kustoms would still have the same tone just more power. I'm sure Kustom could get a deal with emmince for some fifteens to handle hundred fifty each for the cabs and wa la.
The cabs could be deeper as in the 250 series and the heads the same depth as the cab to retain the original plexi look and not the slant of the last.