I think that was me . You still enjoying the Mjolnir? I miss it and my 007mk1s from time to time...I recently traded in a pair of original sr-009 for a new sr-x9000 . Ordered in August but only received just before Christmas ( about 4 months waiting list ) . I'm driving them with a Mjolnir KGSSHV I bought from a guy on pinkfish who lives in the next county to me and was able to deliver personally .
I didn't realise the Mjolnir guy had published the circuit diagram - I know the chinese have tried to produce some clones but they had poor reliability as they tried to cut corners on the parts spec . While my soldering skills are reasonable I don't think I would want to risk spoiling several thousand pounds worth of components so would probably just buy direct from Mjolnir although the VAT would be a bit annoying.