Vert interior re-dye project

Hi all, im working on re-dyeing my interior to cinnamon and need some help on the seat disassembly process for a vert. Im simply looking to separate the upper and lower seat portion without having to rip apart the entire seat. Here's where im at. I've circled in red the bolts removed so far, however, the bottom t-50 bolt just doesn't want to budge no matter how hard i try. Im not entirely sure if these are even the right bolts to remove... Any insight would be greatly appreciated.

Ive also added a couple of pics of the dyed parts completed so far for those interested. I will be posting the end result pics along with a few useful tips that i learned along the way that made the prepping and dye process a lot easier

cheers,
Oli