Good return 8ball. It is good to see more bees starting to evap the NP to recover their freebase. Who knows, by the time the NEXT generation of gakks begins to surface in all available pillstocks, bees may not have any other choice.
I noticed that you chose to use acetone to rinse your freebase of the orange oil.
***Swim has found that after a couple acetone rinses it will start to pull pseudo freebase.***
Swim has also found that if too much of the NP is evaporated away, the oil gets too concentrated in the freebase and becomes more difficult to get rid of.
After evapping the NP, Swim finds it best to decant as much of the oil from the freebase as possible. When one gets to the point to where all that is coming off is a few drops per minute, Swim opts to add fresh Xylene. One can use a stirring rod and mix the mass of freebase with the fresh Xylene and proceed to evap it down again.
When most of the Xylene is gone, the mass of freebase will once again reappear at the bottom and what little Xylene remains will have absorbed the remainder of the residual gakk. After allowing the contents to cool to room temperature, the rest of the orange can bee removed.
It is a little more work this way, but at least one will know for sure that any loss of precursor is negligible.
By doing it this way, one can run the freebase in a rxn "AS IS" or further titrate with fresh NP and water to get the HCL salt.
Sorry for the repetition, but hopefully the rest of the swarm will catch on. Swim has been dealing with this curse for a few months now. It must have hit his area first. If you are a US bee and have yet to experience this menace, I'm sure you eventually will.