WOW - No, I hadn't even thought about mounting something under there. What a genius idea! That would be perfect - it would save me from doing all the excavating. I'll still do a refresh of the mulch, pulling some of the old out and replacing like I do now, but w/the barrier between the ground and shelves, I wouldn't have to worry about doing extra deep digging. Perfect! Thanks for that bit of brilliance...it will be implemented next spring.