About this 3D model

This is a extruder plate with built in pouring and air holes. This way you can move from plastic to metal parts. Here is a link to our video were we do lost pla casting with it https://www.youtube.com/watch?v=ilTmXVg9oc8&feature=youtu.be . I used the pewter plate and it works a treat. I would do aluminium if I had a good hot foundry setup. I did eventally switch over to the microswiss aluminium plate, but would love to make my own aluminium plate.