Does anyone know the real size of the spindle spanner nuts on the Grizzley 10x22? The manual says M30x1.5 and there is no way that's right. The minor diameter of that thread is smaller than the un-threaded rear of the spindle. I measured about 38mm quick with calipers on the inside of the nut but I need to be sure. I'm making a replacement spanner nut with built in rear spider.