well , i tested the amalgam with and without rinses, and the result is the same in yields.... then, i prefeer to rinse to eliminate at least a part of it, in the mdma production, there are many routes, but if you decide to make alkali-acid extractions , the HG should just get out , anyway, if the yield are the same...why not try to eliminate at the very first step? maybe in the final result is not important, but if you can be less expossed to HG while reach those steps i think worth the 3 minutes in rinses step.
as for the p2np , in fact i think is not neccesary at all that the AL foil is completely "melted"(my english haha) , it seems you can discard a lot of unreacted foil without yield loss, but in MDMA if you dont wait till the AL foil is completely reacted you will have a big loss on yield.
as for the temperature, i think should be apply to keep the correct reaction temperature, even when the exotermic reaction finished, when done it the bubbling etc keeps running and less time to wait...
if we left it by its owns , the reaction will continue till all is reacted, but it can delay more than 12 hours, normally left it overnight.
as the amalgam is an equilibrium difficult to control al 100% we have to keep watching, ideally in those 6 hours should finish the reaction, without external temp, but it depends on a decission of maybe seconds? just wait to see dark gray... wait till foil floats? when it happens how much will wait till rinse , or add the precursors?
maybe one day ill be able to do always the same, but this day has not reached yet haha
sorry for my SpainGlish