Wow, that's cunning but long winded... So it'll get the going-up-or-down-pulse combined with the original run/stop signal being present for the going-up-only part of it, and without for the going-down-only part of it, which means you've got the start and stop of the run/stop signal feeding the A-157's start and stop signals. That's very clever. Thank you!

I don't suppose there's a solution that doesn't require buying an A-165 and A-166 and wiring up a complex patch :)