Hi, I know it will be frowned upon, but in soft materials (mdf, ply etc) I use 1/8" end mills with 1/8" shanks and allow them to go a bit deeper than their theroetical (16mm) cutting depth on the last pass and get good results. I would not try this with plastics as I think it would cause melting. You may find this worth a try. My spindle only has a 1/8" so this is the only way I can cut 18mm material. Good luck with your new machine when you get it, I'm sure you will love it and will never want to go back to doing things the old way. G.