Just finished, Pretty straight forward. NSC 1590BB size Enclosure
Located PCB Equal Down Both Sides and minimal clearance from Top for Power Leads & Battery Wires.
Replaced Switch with a SPST Momentary Soft Touch Footswitch, Measures 60mm Centre's to Tone Pot!
Replaced Power Jack with 5.5mm x 2.1mm Panel Mount.
No Mods required for PCB, Input & Output Jacks.
Used 6mm Adhesive back Foam under Battery & Back Lid.
IMPORTANT - Remove Pin Tabs At Base Of 3 Threaded Pots Or PCB Will Not Sit Flush And Flat!!!
Hope this is helpful to those looking for an Alternative!