Can I add roll up sides? Does the Caterpillar Tunnel Max come with extra plastic to use for end walls? How many 30” beds can I fit inside a Caterpillar Tunnel Max? How will the Max tunnel hold up to wind? Is the plastic included with the Caterpillar Tunnel Max? Is there a 4-ft bow spacing option? What end walls work with the Caterpillar Tunnel Max? What is the diameter of the bow on the Caterpillar Tunnel Max? What is the gauge of the bow for the Caterpillar Tunnel Max? What is the peak height of your Caterpillar Tunnel Max? Will there be a pro version like the 14-ft and 16-ft wide Caterpillar Tunnels?