The stock Losi air filter box is a pretty bad design. It is extremely easy to get the filter elements caught on the bolts when you're assembling it, and almost impossible to tell when it happens. For the second time the inner element became slightly entangled in one of the bolts, twisting it just enough to allow unfiltered air into the motor. This is made far worse by the fact that my local bash spot is covered in extremely fine dry soil -- much finer than sand. It's basically dust. My electrics like the X-Maxx can bash at that spot all day long and just need a bit of compressed air afterward. The gas trucks on the other hand seem ultra-sensitive to this sort of fine dust. I've had maybe an hour of running time with this Losi and have gone through two motors -- the latest one an OBR. Hopefully it can be rebuilt OK. So I'm getting rid of the stock Losi airbox and replacing it with the Turtle Racing unit that adapts an HPI style filter, which is far less likely to leak. As for bashing where there is fine dust everywhere, maybe I'll just have to stick to grass or something from now on. Any tips regarding protecting these trucks from dirt much appreciated. E.g., I couldn't even *find* outerwears designed for the new square Losi airbox.