Sure, that's standard on all my alloy bikes my folder included. I'm referring to examples like the one posted earlier in I think it was this thread, was it your good self or someone called it internal webbing ? Welded from the outside but fitted internally to bolster the hinge area. Now to me at least that's not the best way of adding strength, on steel maybe but aluminium not so sure. Has to be a better way. Ideas anyone.....?