MDF Inner ring

Yesterday I bought a circular MDF 46x18mm to make the inner dome ring. I sanded it about 3/4mm and then cut out the center to fit the bottom dome ring. After that, I presented the inner dome ring and put the outer dome and Dome Base Plate, here it made a mistake trying to force the Dome ring and broke the thin strip below the RLD. I will need to glue it once everything is done.

During the weekend I will drill the Inner Dome Ring and try to fit everything before I receive the body frame.