Removed phono input section.
Old Amphenol input jacks replaced with 1/4" insulated shorting jacks.
Install grounded AC cord and remove AC receptacle.
All Electrolytics replaced, filter caps bumped to 20mf.
C14 removed and replaced with jumper.
R24 removed. 
R23 removed.
C13 removed.
R21 changed to 2.2k.
Presence pot (10K linear) and cap (.1mf) added.
Inputs converted from grid leak bias to Fender style 33k/1meg cathode bias with shared 1k cathode resistor and cap.
Pins 2 and 7 jumpered on input 12AX7 to facilitate mixing of channels.
Plate resistors on V1 changed from 220k to 100k.
680pf bright cap added to channel 2.
Added 1/4 inch speaker jacks like on Fenders.
Out of spec .68R resistors in heater circuit removed to fix heater voltage problem. 
Separate cathode and bias resistors for output tubes, 680r/25mf.
500r screen resistors added.
Changed Input 1 volume pot to 1meg.
Removed R34.
Removed C17.
Removed R31.
82k NFB resistor was actually 100k, added parallel 68k.