Step 1: Tools and Materials
Automatic center punch
Round nose router bit (I used 12.7mm)
Round over router bit
300x300x18mm piece of wood
60 x 14mm marbles 10 of 6 colours
Board template (attached as pdf)
Varnish, Oil or stain to finish the wood
Step 2: Marking and Drilling the board
Once you have the board marked it can be drilled. I mounted the round nose router bit in the pillar drill and set the depth stop on the drill. I would suggest practicing on a similar piece of timber to set you drill to the correct speed to achieve a nice finish with the bit.
You may have the same problem I faced and could not position the board on the pillar drill to get a few holes in the centre of the board. To get around this either use the router bit in a hand held drill or use a plunge router.
Step 3: Finishing the Board
Then give the board a good sand down and I chose to finish mine with linseed oil.
Set up the marbles and you are ready to play