I see that from what I'm reading here. FWIW I dont know why they dont just put everything in the fermenter and leave it.
Given some consideration it's going to give roughly the same amount of extra grav points at the start and finish over and above the fermentables. So for the purposes of the exercise couldn't you just add that portion of the adjuct on the end anyway as it's not going to affect your calculations anyway.
unfortunately butters is the mathematician I tend to go more by feel
One of the problems I have, I added it to the spreadsheet and the % alc goes down as I increase the maltodextrin :huh: needs more work.