The design I tried to keep as close to the normal files as possible using the same mechanics and only changed the height to give a taller print volume.

I included the DXF file as well as the Asipre file I used to cut on my CNC router. I used a 3mm endmill with a 6mm MDF sheet

Should you use the Aspire file, please note I did set the reference point to be the bottom of the wood sheet and not the top. The reason for this is because I zero my CNC always on the top of my spoil board, giving me a fixed reference point regardless the thickness of my wood/material I use.