This is a tool I designed to clean off stuck plastics from my build surface. The blade is almost flush to the build surface bed, so items are removed easily from the surface. It also works well removing parts from the bed.
3mm screws along with M3x6x5mm knurled brass inserts. The handle connection uses 5mm Screw with M5x8x7mm knurled brass inserts.

I designed this with Fusion 360. Message me if you would like the Fusion files.