Dean,
That would be very kind of you! About 400mm diameter would be good and I do use LinuxCNC. At that size I suspect a 60 degree cuter would produce a good result without going too deep but use 90 if you think otherwise, I have both.

I've spent some time over the last few hours trying to get CamBam to play ball with the calendar, having downloaded a DXF image. There is a free V-Engrave plug-in for it produced by one of the very active group of supporters. This does an excellent job most of the time but has thrown in the towel (as have I!) on the extremely complex shapes in the calendar . For any other CB users who are interested, the plug-in works extremely well on engraving text but it is sometimes necessary to work out which objects have to be selected and converted to a 'region' within the software. The V-Engrave plug-in along with many other excellent additions is available from...

http://www.atelier-des-fougeres.fr/C.../Vengrave.html

This is a french website but it does speak English!