I just finished building a pedal version of the Traynor Monoblock II preamp. I used the factory schematic and followed it exactly for this build. the original preamp runs on a bipolar 15 volt supply so I added a bipolar charge pump to enable the pedal to run off a standard 9 volt power supply capable of at least 60ma.
here's a pic of the completed pedal in an etched 1590BB with all top jacks and a relayed true bypass:
and here's a soundclip of it with a P bass thru my 215 cab:https://soundcloud.com/johnk_10/monoblockii