I posted a conversion last year or so, but I couldn't get the legs right until I went to 3D art and printing. Btw, this is a personal project right now. It would be really interesting to do a line of 28mm GearKrieg mechs, but it would cost way more than I have pennies to do right now -- from 3D model to prototype, to professional resin mold and production (including finicky metal bits), electronic storefront costs and that percentage to DP9.
It's been quite a while since I last saw the 28mm Early conversion posted on this forum.