eh, i see no reason to discourage thorough preparation

its personal preference really (though i believe there can still be some unprecipitated DMT in the solvent if you FP it, but that doesn't matter if you are re-using the solvent anyways)

no, but 4 is an alright ph.  really as long as your are following the tek you can't go wrong (not that its easy to go wrong at the acidifying stage anyway)

this part has me confused (also sub-boiling temps are sufficient, boiling probably won't hurt but there is no need), why seperate the container? there is still going to be DMT in the bark sludge, so why not leave it with the water?

my experience is with dry teks, so you may be correct, but i don't think you would need to add enough water to necessitate a reduction.

i don't know if you necessarily need 3 defats, but overall it sounds like a viable method of extraction.

i see no reason it won't work.

also there are tons of teks here, so before deciding on just one, look around and see what looks best for you.