wood holder for cnc machine

i have some timber i get from B&Q and wanted to engrave / router on it.
the wood dimensions i am using are 38mmx63mm
i can make other sizes if you require
https://www.youtube.com/watch?v=jaglvxxmSNA

Then i fancied routering on all 4 sides.
so i designed up this holder to all the piece to be held in place in its height and width orientation centralised.
this should allow me to router down the length and then flip it to the next side and router that and so on until all four sides are done.

one piece is open ended to allow the wood to be held at any point.
the other has a stopper on it to allow the wood to butt upto the end and keeping it in the same length position.

i have designed the screw holder and two positional triangles to mark the center line - so i will router a center line on my cnc bed and then position this on that line.
These are referenced to my home limits so i can design and just put the wood on router - (* hopefully ) will put videos of build and finished routered wood later