Converting a Proluxe to Cathode Bias

[Orwells Ghost]

Hi Folks, I'm new to this forum and hoping someone here could offer me some pointers. I've got a Weber Proluxe (5e3 with fixed bias and 6L6's for 40-watts) with some big Mercury Magnetics iron. It's a bit to stiff and powerful for my liking, so I'd like to convert it to cathode bias, bringing it a bit closer to the original 5e3 spec. I'm hoping for a spongier feel and a bit less headroom. Can some of you knowledgable folks instruct me on how best to do this? Secondary question; once this is converted to cathode bias, should I want to run 6V6's would any further modifications be required? What about KT66's? Many Thanks in advance!

[printer2]

See this

http://ampwares.com/schematics/pro_5e5.pdf

Transformer secondary has to be different to run 6V6's, can do it if you have the right secondary taps.