AGI 511 Preamp... GEO JAP Are you out there?

First-time poster here, just signed up. Great forum!

I have recently acquired a very impressive AGI 511 Preamp, circa 1974.

Until now, I have been using the highly respected TRANSCENDENT SOUNDS GROUNDED GRID preamp designed by Bruce Rozenblit, which is still my go-to preamp.

But the AGI is truly impressive... Spectacular even!

I am keen to hook up with GEOJAP (Jason) or any other members who have experience with the AGI 511 Preamp and any potential mods.