Sorry I missed this!
Here are my answers~
What products do you guys use to prepare for a braid out?
I braid on freshly washed hair with my leave in (currently looking for a staple. Using Maui Moisture Curl Milk currently), raw shea butter and olive oil on top.
Rebraid with water, leave-ins, shea butter only on ends
Undo braids in the morning with oil only
Do bigger plaits result a better braid out vs finer plaits?
For me, yes. I prefer a more stretched braid out. With finer braids, it ends up more angled and puffy for me.
Do you get a better braid out styling on already dried stretched hair or on damp hair?
Do you mean initally or rebraiding?
When I first start it, it's always on wet hair right after deep conditioning.
When rebraiding, I don't wet the braid apart from the ends. Otherwise I get a lot of tangles.
Hope this answered the questions