This guitar pedal came in for repair, and to add a DC socket on. (Jeremy Clarkson not included, thankfully)
I couldn't find a diagram anywhere, so for future reference, and for the common good, here's the schematic:
TR1 was U/S in my example, although, in a similar manner to the Trio amp (here), had two junctions, and tested OK on the transistor tester!
Amazing two BC109's and a slack handful of bits and pieces, can fetch so much money on eBay!