I just ordered the Bald Eagle spider from Grizzly. Does anyone know what the diameter of the 4 bolt pattern is, and the hole size? I have a back plate set up in the mill, ready to drill, but can’t find dimensions. I know I should just wait until it arrives, but Corona boredom is taking it’s toll on me. If anyone has deja vu reading this, I posted it on another thread to get maximum exposure.