Why no interest in reel to reel if you're looking for the ultimate sound?

hypoman,

Thanks. Leaves almost no question unanswered.

The only thing, out of sheer curiosity, is that you mention a number of things to be fixed with those kits. It does read as relatively complex "I assume you know what you are doing" operation and not something a novice should embark on? Is that right, or is it really simple?

Again, thanks for your post.

glupson, doing an overhaul requires some decent soldering skill, a basic understanding of electronics and above all, patience.  The mechanical disassembly of even a well designed machine like the A77 can be challenging.  Having a service manual is also a must as there are lots of little traps that can be avoided by doing some reading in advance.  Also needed are the proper tools and at minimum a good quality digital multi meter.  To actually calibrate everything once overhauled, you would need an audio oscillator, a VTVM and of course, an alignment tape for the speed and equalization standard your machine requires.

Ya @hypoman real world experience w Studer Revox !!!!

do you have the zoom ? I love mine

I would add and amend my earlier comment to high speed, half track and IEC EQ

tomic, my PR99 MkIII is IEC eq (CCIR for us old timers). It lives in the wooden case that was offered as an option and has the confidence monitor amp/speaker unit as well.
My Zoom is the F8n and I also have the FRC-8 control surface which is very convenient.