Hi! Good night! This is iury from Chopper Builders Group. I would like to work in a mechanism like Patrick Sthefanski did, to move the head up and down. Additionaly, i planning to rebuilt a compatible botton disc for PETG, fixing one to another using bolts and nuts. Do you mind to share the STL of the top and botton discs each one in a single piece? Or maybe just the dimensions. Thanks!