I seriously hope you don't murder yourself trying to wear it. The payoff would be awesome if it works, but that's a big if.

I'd suggest another padding around, underneath the buckle, as that will end up hurting your foot rather quickly. <^\/^>

Very cool idea. I was actually just researching if anyone had found a way to effectively do this just the other day!

Is this going to be an anthro iron man suit?

Wow, that's quite an engineering project there! Good show!

Wuff has to second Shard's recommendation. The thin contact points of the buckle you're using are going to apply really painful and potentially injurious point-pressures to the top of your foot! This wuff's author spent a fair amount of time "in harness" while in military, wearing both safety and equipment gear.

Take a quick Google on "safety harness buckles" or "climbing harness buckles". You'll see that they are designed to lay flat and spread the pressure evenly, and to provide some inherent padding from the way the straps loop through them. Back one of those with an additional thick leather or double-layered web belt pad, and you'll be FAR more comfortable and avoid foot injuries. And since they're rated for safety and climbing, you can be sure they're not going to slip or come loose by accident. Plus, you can cinch them just as snug as the one's you're using.

Good luck with the rest of this build! Can't wait to see your results on the final suit!