I was mowing under some low bushes today. Apparently the bushes snagged the ring pin on one of the front casters and pulled it out. I didnt know it until the front caster fell off! How embarassing. After wasting about 30 minutes looking around on the ground I was able to find the pin and several spacers but I still lost two or three of them. I contacted BOP already about getting more. Be careful out there!