Hi Jim you must be delighted with that amp - it sounds absolutely great and your playing ain't 'alf bad either !!
I'm not a bit surprised about the amp because about five years back I made a clone of a Fender Tremolux (with some help and advise from Roberto Pistolesi) and that really is good for an early Shadows sound. The circuit is very similar to the Fender '57 Deluxe amp.