Fans should not be directly pointed at buds, just in case.
I dry in similar conditions, but i remove from stem and place on mesh racks. This takes about 9 days.
I don't see hanging larger branches taking more than 2-3 days longer, so you'd be fine.
If concerned, snip them all the stem down to buds and put on a mesh reck.
stem snap.. wholey depends on size of the stem.. so that's as much art as anythign else... is it dry on outside.. give it another 24h from that point and try sealing. if it gets too "soft/moist" on exterior, remove. (check every 6-8 hours the first day in container to make sure it doesn't sweat too muich)
stay consistent with how you dry, and it beceomes more familiar. I chop down a bit smaller than you, so it would occur faster for me. I feel my buds and when they are nearly the right weight and a little crispy on outside i know it's safe to cure/store. When they first feel slightly crispy on outside, i know it takes 12-24h more. It may takea a bit longer with the branch attached. Just something you have to do.
obviously density and size of colas will impact it, but the same temps and rh will have very similar results... and once oyu have a decent baseline you'll also be able to do the mental math on varying densities and cola sizes within reasonable error. 2-way humidi packs are great and allow you to err slightly on moist side, which is better than over-drying and re-hydrating. buy Boveda.. not integra boost. integra sucks donkey balls.