I picked up an SX-850 last summer off CL, a bit of a mess inside, but a pretty good price I thought. Ran it for an hour this morning to make sure it still works as it did when I purchased it. Scratchy balance control, adapter switch needs cleaning, and a bulb is out, but that's it. Starting on the refurb now. First up is the power supply (AWR-101), but I have a question. When I put together the parts list for this one some time ago, the common replacement for the 2SB507 (Q2) was a KSA940TU, which I have in stock, but I now see the MJE15033G is recommended as the 940 is going obsolete. Any reason not to use the KSA940? I know I like to see picts of refurbs so I'm going to post a bunch of this one shortly.