Thanks, but I just re-drew Doug's design, so all props to him.
I missed out the cascode because a third tube would have put too much load on my SMPS, and also have added hugely to the current draw, what with the extra heater and all, probably I would have needed to use a wallwart with double the ma to implement it. I'm running it from a 12 volt 500ma regulated wallwart, but I believe the wallwart puts out more ma than it says on the box. Also, Doug stated in the recent thread re. cascode that he thought it's more trouble than its worth. So this little submini version is 'stripped down', if I need boost I have a few pedals available.
I'll do some soundclips when it's built, as it's on two breadboards (one for the SMPS, one for the amp) with the 125A loose, so not easy to move to where I'd need it to be to record it.