So the first pics are back (I should be able to put digital images up in the next couple of days) and I have to say, they seem to have worked out well. The lens I was using for most of them advertises itself on the front retaining ring as being made by Formula 5 (by someone else for them, I suspect), and on my K-5 it distinguished itself by a tendency to haziness and lack of contrast. But it was the nearest 135 to hand that I was ready to risk by the water's edge and its lack of SMC-Tak-style aperture coupling counts for nothing when I'm running battery-free, so on it went... and oddly enough, the flaring and other unpleasant behaviour it had exhibited on digital was more or less absent on film.
I am not completely sure that ALL the shots I took were with that one lens, but I will try to find a couple that I can put up which definitely were.
Also, my S1a came back from CLA and I put a trial roll of Gold 400 through it yesterday. Given that it doesn't actually have a meter, and that I was fairly happy with the exposures the Sekonic was advising on the ST705, I am not inclined to wait for the test shots this time around - time to throw in a roll of Tmax 400 and get cracking.
Unfortunately its companion Super Tak 55/2 came back from the same CLA with the aperture blades still sticky*
and what's more my SMC Tak 55/2 has developed the same issue, but fortunately the S1a is one of the late-model Red-R variants which should accept my Super Tak 50/1.4 without any issues, and the fact that the latter is visibly yellow shouldn't matter with B&W film. If anything it might help!
* I've emailed them about this and am awaiting resolution.The blades appear quick to close, slow to open, so it may not actually make much of a difference, but I still don't want to trust my pics to a lens that isn't performing per spec.