Modifying the TAD-60

I was an early adopter of this pretty good amp that was imported by the late Paul Grzybek. Paul was very good communicator an shared a lot with me over the years before he passed.
I was inspired to do some mods by what one A'goner sold earlier this year, which was a massive rebuild. This amp is actually listed again presently.
Mostly PS stuff which I am planning to do, but also some changes to the driver circuit. I will be starting this weekend and reporting my progress and welcome any info or suggestions, of course criticism as long as it is in the DIY spirit.