Heat your Naphtha as high as possible and then do a recrystallization.
The solubility of DMT in Naphtha dramatically rises with temperature and even though you dont 'need' such a high solubility for all of your goodies in the water phase, it really accelerates the migration of DMT from the water into the Naphtha.
This way you will get much more of your goodies out with much less pulls and then you will just need a tiny bit of Naphtha again for recrystalization.
You may even miss some goodies out if you pull too low and not pull often enough - so I would recommend to stay safe and get your goodies out as much and as fast as possible, then purify
if needed afterwards.
It may also heavily depend on the bark, I encountered where pulling at 60 °C (lower boiling range limit of regular hardware store Naphtha) already produced totally white material.
EDIT: So you refer to a special TEK and I never read it and dont know what it tells, but what I told is still valid overall.