mine either..
this is how i did mine...
using a 45mm ruler
you really need alot of room, if your leaving the squares in place,because it is so much easier to move round the table. and not cutting backwards,or sideways.which not only may mess up your cutting, but it dangerous! yikees!
..seems to me, it would be so much easier to place them off to the side, in the order they should be in.