1/2" Birch Plywood: roughly 12" x 3"
Pegs:
2 x Brass from 3/16" diameter by 3"
2 x Titanium or Stainless Steel from 3/16" dia. by 3"
8 Magnets - 6mm diameter x 3mm Thick
https://www.amazon.com/gp/product/B07MX57ZGK/
Thin hand saw
Wood glue
CA glue
Finish - OSMO Polyx-Oil
Cut the profile from over-sized plywood on double stick tape.
Cut holes to 0.375" deep.
Cut inlay piece on table saw.
Cut inlay pocket 0.005" oversize on tool using the Grid feature and the Rectangle tool (no CAD file).
Glue in inlay. Sand flush.
Cut in two with a thin hand saw.
Cut bottom and end pockets, with magnet pockets 0.005" over-sized.
Glue in magnets with CA glue. Pay attention to magnet polarity!
Sand and finish.