Since the adding gain stage idea was sot down, I think the next one on the list in the reverb mod. Question is, of course, how much of the sound differ?

The Rev B is using post-master reverb, while the current version is a pre-master reverb. Since I am uncertain as you how it would sound if I proceed with the modification, can people list some examples that use post-master reverb, and examples that use pre-master reverb? Thank you.
Ibanez SA-120 (ed.2006)
BluesJr 1996-B + cathode follower + texas Heat
Crate CPB150
Homemade 4 x 10 cab Bass closeback
Metal Muff