Yes, you could do that - but you'd need to select your tubes, inductors, capacitors and possibly resistors in order to get decent tracking between channels. These mentioned in order of importance.
Specially the high-boost inductors AND capacitors used there need very high precision in order to not get annoying at high Q's (for my G14 I aim for 0.3% on both inductor and capacitor).
Note, on the other hand, that the absolute values are not all that important, so you can just buy a big handful of parts and match from there..
/Jakob E.