Stray, I put a dent in the frame early on, and just rode it anyways. Then I went for a nice trip to the mountains, and that is where I know I did damage, with rocks, stumps, and other various obsticles. I still didn't have any skids. I wish I had some pics, as I couldn't believe what had happened, behind the motor in front of the brake. I don't know for sure, but I think I'm going to use some plate on the underside, probably somewhere around 1/4". It's probably overkill, but after seeing what happened to mine, and hearing about others, I will definetly mod. the frame.