heyyy! i am glad it was helpful

yes plain water, after you decant the basic water, inevitably some of the basic water will be left behind.. so you need to keep diluting it with plain water until it is safe to use..

in step 4, the reason for the wash is to dilute the base so we don't have to use a lot of vinegar to reacidify the solution.. in step 6 the water washes are much more necessary to obtain a safe to use product.

btw i edited the post a bit.. nothing major just little things

also i will be adding a new better method to remove more of the water at the last step before drying the freebase