Top and bottom plates drawn, just the spacer block left.

The smaller hole in the bottom will take a 20mm spigot that will lock into an R8 collet in the spindle.

Click image for larger version.  Name: Bottom Plate v9.png  Views: 1238  Size: 208.0 KB  ID: 19051
Click image for larger version.  Name: Top Plate v10.png  Views: 1130  Size: 169.5 KB  ID: 19052

Metal arrived today and the mill is almost ready to go.