Originally Posted by DoctorCAD
SG of 1.072 will not get to 19%, closer to 12%.
SG of 1.072, assuming an FG of 0.098 will yield 12% - 13%. Correct. I think maybe you missed the staggered addition of the additional 5 lbs of Dextrose. I don't personally know offhand what ABV increase each pound will add without doing a search, but I'm sure it will be at least 1% per pound - ish.
What I don't have a good grasp on, and maybe the OP or Yooper can weigh in here, is how to take accurate measurements of FG when you start at one SG (1.072), and add fermentables at staggering rates. I'm unable to wrap my feeble mind around it after a few drinks.
Lalvin K1-V1116 is advertised at 18% tolerance, so I think you should be real close. I just don't understand the science of how to devise staggered additions and ABV.
Looking forward to your results though........I love anything pineapple related.