1000mm Belt Length

How long do we cut the belts for the 1000mm X-Carve?

IN THE ASSY VIDEO IT SHOWS HOW TO CUT IT i JUST LAYED THE BELT FOR 1000MM BUILD ON THE SIDE RAIL AND LEFT ABOUT 4" ON EACH LONGER THEN THE RAIL HAD ALL THE NEEDED WITH LEFT OVER

The video on the instructions at http://x-carve-instructions.inventables.com/step06/
indicates that you should cut your belt into three 4’ pieces.

what does everyone do with all the extra belt on each axis. Cut it off? Leave it?

3 equal lengths of the 4 meter belt came out to be about 5.375 inches plus or minus.