are you probing in the same area you have the thermometer in the pic ? Seems that's not the thickest part of the flat..
if point is tough, it's likely the thicker part of the flat is tough as well.
try and probe higher... based on that you may be able to pull or have to leave on longer.
you came this far, don't mess it up now !!!
XL BGE (#2) & Performer Platinum
Former owner: Jambo Backyard, Klose BYC, Lonestar Vertical offset w/ Insulated Firebox, Medium Spicewine, Pitts & Spitts, XL BGE (#1) & (2) Medium BGE's, 22" WSM & (2) 18" WSM's, 18" & 22" Weber Kettles