Thanks to all for the encouragement and caveats. I've got the Gun Digest issued book of shotgun disassembly which mentions the barrel latch trip in step 24. I remember two gentlemen (one of whom sent me a dimensioned sketch of a Fox rotary bolt trip) who've "been there and done that" and know that experience is recognizing a misteak when you are just about to make it again. I was surprised to find that removing the sear axle and sears is NOT necessary. As for the screws, I had to keep track on a Manufrance Ideal I opened up a few months back so I'll probably remember here despite lack of engraving. I'll go slow and see what can be accomplished by a good soak in a can of gas. I could run back to the shop and beg for an adjustment from the consignor but doubt I'd get much satisfaction as representations of condition on consignment guns are conspicuously absent.
jack
