The usual rule of thumb in 1g bark = 1ml solvent , but as you say it would be about 2 lt , I no that you should be getting more then

1-2 g per pull and I no that xylene will pull some of the fats that are in the bark ,

And answering you're previous question ;-

1 - yes the shellite does freeze precipe and I do my pulls with soup at room temp and shellite is hot , the reasoning with room

Temp soup is you will pull more fats when the soup is warm ( don't no if this is fact ) but I've herd this from quite a fair few

Experianced ACRB users !

2 - water baths should be about 45 degrees

3 - I mix my pulls for a few minutes and seperate 4 times !

4 - Kcb is from supercheap and haven't here much about it !

5 - I use everyday cooking white vinegar with good result !