if the sbm-1 needs repair you can still go to paul and tom at prodigital. i recently had a problem with my sbm-1 as i reported in this thread:
http://www.taperssection.com/yabbse/index.php?topic=32815.0I took it to paul on last thursday and it was ready on monday for me to pick up. i will be picking it up tonight.
turns out there was a fractured lead on the rca connection to the pcb board and they replaced it and verified everything was ok. i never told paul it was modded or not, but i imagine he knows it is. (FWIW, doug o did not mod the sbm-1 that i have...someone esle did who replied much earlier on this thread)
i will discuss it with paul more this evening when i pick up the sbm-1. i'll let him know that doug o is no longer doing the mods. i am sure paul and tom are capable enough to perform similar op amp replacements. but not sure if paul has an ear for what is now the warm, prescence, or transparant op amps that doug uses.
if i have time today i will search the oade (old and new) boards and ts.com for the op amps that he prefers for the sbm-1, and pass that info on to paul.