DavidA, it may be helpful to you to go through my process for making bio in cubies. I know you want to make really good bio but its really hard to water wash using this method, best to bubble/settle then woodchip, you will still get to zero soap.
When you have processed to your liking (clear 10/90 of whatever) leave to stand overnight.
Pour the bio into another container, try to make sure you pour as little glyc in as possible.
Bubble for 24 hours
Leave to stand for 24 hours.
Pour through oak woodchips (make sure you pour NO glycerol into the chips) You can then use the bio. If you check for soap it should be zero.
You can gather all the residual glyc with a small amount of bio and use it to glyc wash some more oil, you can do this in a cubie as well. Everything can be done at ambient, I've made bio in cubies outside at about +5degs.