I just put new outdoor carpet in my boat, and by battery boxes are slid under the back seats. What can i attach to the underside of the battery box permaently to make it slide better? the plastic box itself, when pulled (because its so heavy with the battery) takes a toll on the carpet and it will wear a hole in no time. I don't have to take it in and out all the time, but if i need to, i'd like something under it. I'm thinking about maybe getting those mini "furniture mover" discs and double sided tape them to the bottom.... sound good or is there something better? (There is no room to lift it out, it has to be slid)