Jadaharabi said

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I know this is for snowmobiles and I have to disagree with anything that has to do with snow. But rather than welding nuts on to screw into with your plywood why don't you use the deck screws like they use on a flatbed trailer. You can get them at Home Depot or Menards or any of those places. You just screw right through the wood into the frame they are self tappers and they drill their own hole.

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