I left this P. Superbum in a pot too long and the top part of the shield fronds started growing straight up. Now that I have mounted it, I am worried that the plant will grow deformed. Would it harm the plant if I trim all frond points growing straight out in this photo and bring it back toward the board? Will this help the next set of shield fronds to grow correctly? I would hate to loose the plant this way, but also dont' want it to grow deform.

http://i200.photobucket.com/albums/aa110/pga7602/20140916_114838.jpg