I have run plows on rigs for years, meyers used to sell a lexan plow blade for lite rigs but they cost a bunch, costco sells a cheap blade that is ok and does not weigh that much, the problem with most guys rigs is how they plow, they try to compact the snow in a pile by ramming it so it is like getting in a wreck every time you hit the pile hard, that is how you bend frames, the longer your frame the more it bends in the center, if your pushing powder that is no problem and your doing your own yard where you know where stuff is so you do not hit any stumps or cement steps you will be ok,the front of a track or kick has the frame so that it will collapse in a wreck so I would add on a mount that goes back underneath the rig by the middle of the rig and weld a bracket or cross member and put rubber mounts on the bars running forward to the plow mount, that should help with the weak frame in the front!