That's five huh?
My opinion is that they will probably soften a bit, and you might have to run a bit more, and your sidewall IS a BIT more prone to damage, but if they look just like that on the trail, it is close to PERFECT for ultimate traction. I think you will be amazed at the traction that will give you.
WATCH THEM CLOSELY for signs of spinning on the wheel, maybe make a mark on them and the rim, and and watch of rolling them off the rim, and getting bark and dirt between the bead and the tire..
if all is well, and stays well GO FOR IT.. if it seems a bit iffy, give it another 2 lbs...
Yep, you are gonna LOVE the traction there!!