Fun project! I got much of my inspiration from others on this site. I recently welded up an adaptor for a Meyers blade (manual angle, but working on that) for my JD 870. From my experience, leave the blade float independent of the FEL arms so you keep weight on the front tires but still follow ground contours. Even then I find myself steering with the brakes a bit but I have a really long driveway. If it was paved, maybe I'd consider a rigid mount like kennyd (great job by the way). I found that I can increase/decrease the 'cut' buy setting skid shoes to 'zero' and using my curl circuit. Back lifts the blade onto the shoes for less cut, forward allows it to float directly on the <ice> whatever. Works great. Now to get busy on those hydraulic angle cylinders, the idea for which I will blatently steel from kennyd!