Spoil and Mounting Board for CNC

This is a spoil/clamping board I designed for clamping workpieces in your mill.
It can be face milled multiple times (total: 6.5mm) before the first metal piece shows up. 

Intentionally for light duty work like engraving but it has quite good clamping forces.
so I will try milling to.

Check out this Animation! 

Excenter_clamp:
I tweaked a clamp design of Billiam to fit my needs.
I changed it for use with M5 bolts and also a fit for a bearing. 

Zero_bracket:
I also modelled a stop bracket for use with M5 bolts
 
and machined both out of POM (Polyoxymethylene).
You could aswell print the parts but I made them for my spoil/mounting board for my Stepcraft M500 so why not mill them :). 

Board:
My spoil/mounting board (Base_plate) is designed to be mounted on Stepcraft M500 but works for every other mill with M6 rail and 100mm rail spacing. It's mounted with 8pcs M6 flat head screws and takes 77 wood inserts for workpiece mounting (M5 in a 40mm grid). I also added ~88 pockets for 5mm dowel pins (also 40mm grid)
with this size of a board I can mill without hitting any frame parts with my vacuum adapter

Material list:

• Board (multiplex) 460x300x20.4 (Base_plate.stl)
• for mounting the board: 
  • 8pcs M6x15 flat head screw
• inserts for board:
  • 77pcs M5x10x10 wood inserts
  • any 5mm dowel pins you like

• for mounting one clamp:
  • Excenter_clamp.stl
  • M5x25 screw internal hex
  • bearing 11x4 
  • washer 5.3 (ID) 9.8 (OD)
• for mounting one bracket:
  • Zero_bracket.stl
  • 2pcs M5x15 screw internal hex
  • 2pcs washer 5.3 (ID) 9.8 (OD)

Edit: 
I face milled the board and engraved a 5mm grid (Z-0.2mm) parallel to the machine axis and tangential to the dowel pin holes for alignment purposes (pin holes not machined yet) (see picture).

Also I recognized that my machine vice (mounting holes not 40mm spaced) can be mounted, I just used one hole to screw it down and 2 Zero_brackets on the opposite side to secure orientation. (see picture)