[himself]

You can put a little piece of paper in the developer tray in white light and see it get black

I'll try that. I put everything away for the moment and have no more images to try, sort of collecting info at the moment.
the rest tho', darkslide, shutter, all good.

and to answer the edit of your last post, I'm only trying tiny little paper at the moment and managed to get at least 2 - badly developed - images yesterday with 1:100.