Wish i had some better shots of the tops but you can see and compare for yourself. I believe SZ's DPs are welded on the inside then ground smooth and then they add support by partially welding the outside flanges, hope Greg can verify this. If you are familiar with welding and see how these are welded its VERY impressive. The welds are as close to perfect as it gets with good overlap and penetration which equates to a strong product.
"Do you guys put the key in "balls down", or up?" -BobbyT 10:28:19 03/06/09