Here is what I did to mine ...to beef up the gear box, I opened the bay on TOP of the wing to reinforce it, when you see how little is in there.. a shiver will run up your back..I then made a nice access hatch where I opened the wing so I good go back in any time I wanted...

Second make sure your wheel pants aren't so low they grab the grass.. yeah that will make you cartwheel..believe me

Third this may sound crazy but wrap around your tires with black electrical tape, when you are unfortunate to hit hard and push the wheel against the inside of the wheel pant..it will slide, not grab like brakes and flip you over...

just a couple ideas to try.