I have a long way to go before my first cut, but have a nagging thought that keeps cropping up every now and then. What type of drill do I need to cut 4mm ply. (the first thing I'll try cutting when I push the button for the first time) When I watch YouTube video's of other people cutting into ply, their drills are completely different to the set that came with my ordinary router. I was wondering if there was a site that dealt with this issue of pairing drills with all the different types of materials that we would use on the CNC. Any help would be great. Thanks a lot. Michael.