Bandsaw... Use it to cut one end off for flat base, then slice ball into strips. Be careful to stabilize ball on cutting table. Don't be in a hurry. Cut or break away the core material and discard. Acrylic strips can then be straightened by putting them in a 190-degree oven for a quarter to half hour (check periodically for softness), and then clamping them to a flat surface to cool. Always have plenty of ventilation when working with plastics, and get out of there into fresh air if you feel the slightest bit light-headed or nauseous. I use a respirator, and recommend you do as well. Some of that stuff is just nasty, and the dust you get from cutting is bad, too.
