I tried to be careful at a recent New Mexico event, but still spilled fuel on the bikes from over filling. A loud nearby stream prevented me from hearing the tone change from fuel-level rise. A spill really lights up my language! I hate sticker damage and premix oil stains! On the new 250, one spill stuck dust to the cylinder, and the heat then baked the mess to where it would not pressure wash off. Fortunately, I had a can of spray brake cleaner with me to break the bond, but it took a whole can! Trials bikes fuel tanks are very easy to over fill! I'm very interested in solutions. Bruce Bolander showed me a 2-gallon plastic fuel container he has had for years. A short stem flows fuel when pushed against the tank, then when the level reaches the spout tip, flow stops. Lifting the spout off the tank shuts off a valve for no overflow. I want one! Bruce said the tank was made before the Californication of fuel tanks, so it may no longer be available. I didn't get the brand, unfortunately. How do you all solve this problem?