what i think is important to point out here is that no matter the thickness of the edge, as long as it is reasonable, once a microfracture starts in the edge it will crack through the edge whether its 1.5mm, 2.5mm, or 5mm, it will crack through. the only thing super thick edges are going to help with is wear through the edge, say if you're sliding concrete ledges on the reg. that being said, i put 60 days on my ace of spades this year, smashed the fuck out of them on the rails, they have pretty standard thin edges and all i have to show for the abuse is a bunch of edge cracks, maybe 6-8 or more for each edge, but nothing has pulled out. i've had edge cracks since my first day, nothing has pulled out. do they really matter? i think its a lot more important that the ski is structurally sound in this case, i mean, i've seen 4fronts tear out a foot of edge on their first run.