Ours is a really snug fit. I don't even think water would run through it. It takes finesse to get the stack on. If we remove it from time to time, we can just give it a wipe down.
CQ: Great idea. A twist lock would work better than bolting it down. That would keep it in place just right.
* XL [COLOR=seagreen]BGE[/COLOR] *Charbroil offset (cheapo) and a *[URL="http://www.bbq-brethren.com/forum/showthread.php?t=125966"]project in the making 6' long x 28" diameter offset[/URL] [COLOR=red]<<<[/COLOR]Take a look!