Hey guys, thanks for the additional compliments.
For templates, please PM me an email address you'd like the zip file sent. Also, I have two versions of the templates: Full size (my suit) and a roughly 6'6" scaled down version I made at request a while back. When you shoot me the PM, let me know which zip file you'd prefer.
endo500: As far as mobility goes, it was pretty easy to stomp around in the suit. I even danced in it at the party. Since they're drywall stilts, they're designed to be fairly easy to use and mobile, as well as comfortable when just standing still. Admittedly I found them to be a lot of fun. There's flex at the base that functions a lot like an ankle, a tension spring restricts how far they'll lean forward and back, and is sometimes adjustable. In my suit, the large portion of the shoe was just bolted flat onto the "feet" of the drywall stilts, or rather, the stilts were bolted into the feet. The toes were hinged to the large part of the foot and the shin armor with attached knee was mounted to the leg brace of the drywall stilt, all allowing for the suit's ankle to pivot with the stilts' when I walked.
All that said, be careful if you're going to mess around on stilts, obviously you could get seriously hurt just on the stilts alone, but depending on your costume plan, that could be compounded with limiting other mobility or additional weight. Fortunately this Space Marine foam build is pretty light, the heaviest components are the lower legs due to the stilts themselves. Also be sure to add traction to the "feet" of your costume if the foot pads of the stilts are no longer going to serve as such. The drywall stilts are designed with gripping, rubber traction pads. On my suit's boots I used textured EVA foam screwed into the wood of the boot.
Hope that helps!