You putting it over the old metal or cutting to fit? If over the old, are you not creating a space for water to collect from underneath. I don't know how water gets there for the drain plug to be needed, but I've found it in mine before too.
Yeah Iam going to pick one up when I go get more supplies for class. I think its best to do a little over kill with the tiles and blanket, Iam going to devide it into two sections 1 is for the above the stowage and the other is for the floor where the tank sits. One of my clasmates suggested that I fill the tank up to reduce fumes.zxtoy said:use a welding blanket to cover the areas you don't want sparks to hit.