How tight do you screw down a single piece lid to use a boiling water bath?
Which lids specifically - varies some from type to type?
In general it is finger tight just as normal but then unlike the 2 piece, re-tighten when jars are removed from the BWB and wait for the button to pop.
I'm reusing pasta jars. I know it's not the recommended approach. However, up to now I've just hot packed.