Matthew Lavigne Smith

So today I decided I would remove the gate from my K3 and attempt to file it wider so I can shoot super16. But im stuck. Using the disassembly video on youtube as guidance, I removed the screws and loosened the sprocket...but the baffle plate refuses to come out. It lifts up about a centimeter but thats it. It doesn't appear to be stuck around the edge, but more like its pinned down at the centre/where the sprocket is... Any ideas? Thanks, Matt