allrighty then, now after inspection of both my alpha and saber sails, I can see why my leg was getting cut!
I did the mod and took to the plastic with a knife, took about 2 minutes per sail. No more scraped, bleeding shins!
I can see why they used this profile plastic, to protect the thread running along the bottom of the sail, it just has a very sharp edge.
fixed now.

Im a huge fan of these sails, they have both been awesome so far, its a pretty good move by NP to bring this to the attention of sailors.