I have read in a few places people using Mullard GZ32 (a type of 5v4)  rectifiers instead of 5U4G tubes.  Is this OK to do in the SE32I.2+???  I'd like to try it but don't want to hurt the amp or the tubes....

I have been using Mullard's GZ32's from 1967 (two years older than me!) for quite some time.  To me, they sound a bit more open in the mids and trebles than other rectifiers that I have tried on both the SE84+, SE34I.2 and the TORII mkII.  Also, the bass is tighter with these and all the frequencies seem to be represented evenly!

As I wrote in another post, I switched back to the GZ32's after using Sylvania's 5U4GB's for a few months and I definitely love it with the GZ32's!