It really isn't that hard to make custom shape tiles by hand using the average Joe tools but it's a long, precise and tedious process. I kinda miss doing it with my step father blasting Chris Rhea on the stereo and slapping my head whenever I was "unattentive" and had a 1mm difference from the model, it isn't a huge difference but add it up to all the tiles and you can get a pretty messy job in the end...I miss those days.