Here is why: today I went for a ride with 5 other guys on some new trail. Everything was good (weather, trail, bike...), we were almost done with our 1st 14 miles loop and hauling a$$ when the guy in front of me crashed really bad coming down a 2ft drop (stupid lip almost kick me like a wild horse too

He went over the handlebar and you probably know how that goes so I won't go into the details

To make a story short, when he managed to catch his breath and recover he checked his wrists, right 1 was skinned a bit, and his left one was cut really bad. I mean REALLY bad, you could see the bones and tendons or sumthin. The barkbuster on the left was all the way up and covered with blood, so you put 2 and 2 together...
I haven't heard from him yet, he probably cracked some ribs and hopefully did not break anything, he'll definitly need stiches on his wrist (he didn't think it was broken and could move his hand pretty well)
I have aluminium barkbuster right now and the edge seems pretty sharp to me, WAY too sharp

I don't know what I'll do, smooth out the edge (grinder) or replace them with some platic one, i've heard they're not that expansive and pretty strong. i'm thinking that it won't cut me as bad as aluminium...
Did anyone had the same misfortune?
What are you all using? plastic or aluminium?
Comments?