I started leaving my mowers on the trailer but I can't properly secure the 21. The front handle has just a few bolts keeping it in place and so does the handle bars. What I've been doing is tying knots in my chains around the tires and going through the handle bars. It's close to my window, have security lights and a dog but I worry about it. On my 36, at least I can put a chain around the axle but there is nothing solid on the 21.