Man, there are some awesome design mods that many of you have made to these grills. I am implementing all the ones that don't require altering the grill so far. Essentially PB has told me that anything that penetrates the barrel of the grill (aka a "hole" in the barrel) will invalidate the 5 yr warranty. Has anyone had an issue with that? Also, I think most of us are mechanically minded enough that we would not compromise the structural integrity of the grill. But how does PB even know and how do they enforce. I'm sure PB monitors these sites, so I don't want to get anyone in trouble, but would appreciate your insight.