Waldo Modified Mosvalve 962.
$450.00. Yup. You could buy one for $200 on Ebay/Reverb. This has been service about 2 years ago by Pat Hickman. And then it was modified specifically to pair with an SMS Preamp or SMS Preamp with Maestro Mod.
PM if interested.
"Hi Ho...the Carrion Crow...FoldeRoldeRiddle"