I was going to port mine but changed my mind after reading multiple threads on here. Supposedly it hurts the track's flotation. I'd read up on here before doing it.
This very thing has been beat to death on this forum for years now. 100 guys, 100 opinions! I have always ported my track and it has always helped. I don't do it to exit snow out of the skid, that's questionable. I do it because it makes the track rotate so much easier and I have never noticed it making a difference on flotation.
Aaron