OK, I'm the victim of big time fuel theft! I'm talking 2 tanks nearly drained completely this time. I've been having an occasional theft of gas out of the Z since I got it. A few gallons fairly regularly and a few times nearly 5 gallons. But never both tanks and of all things it was sitting right next to a window. I put it there overnight during a mulch job because I got rained out mid-way and had mulch still on the trailer. The mower was soaked and I didn't want to take it inside. I don't always unload and put my equipment inside every night. I haven't really felt I had too until now, and often it's dark when I get in and I'll be leaving before daylight in the morning. How can I get this thief? I don't want to be forced to unload every night and load every morning. Are there any locking caps I can get for it?