Last Delve vault slot will not go above T1 reward

t1 slotSwitch FormD T1 From 2-Slot Mode To 3-Slot Mode. Since the air cooled GPU we will be using is massive, we need to switch to 3-slot mode. First swap out the 2-slot GPU bracket for the 3-slotHey guys, building in the Formd T1 v2.1. I have a 2.5 slot ASUS Proart 4080, and I'm using the Thermalrht AXP90-X53 with Noctua A9x14. I am wondering if I should use 2.5 slot mode