I usually stir for a good half an hour, then let it precipitate for at least 2 hours, but if you really wanted to you could speed things up and have a good amount of DMT in 1 hour
This method will yeild a cleaner product in less time, give you more of it and save you money!
Think of your solvent as a liquid sponge... soaking up DMT molecules and spitting them out via freeze precipitation. I repeat this 5x with the same 100ml of naphtha per 50g of MHRB and yeild between 1.2 and 1.4 of pure white DMT crystals. Remember not to let your solvent rise above room temp as it will start to pick up fats and other alks and you'll end up with a yellow product.
I myself love a bit o the olde yella, so on the 5th pull I warm the naphtha, yank it right out and then do a full 3 day evaporation.
Just because its different from the way you do it... dosen't mean its not the right way.
Peace!