Walk On Water - you are definitely not going to be happy with that set up and now is certainly the time to change it. You've got a few options at this point. In order, best to worse: 1) If you can disassemble at this point (hopefully you used screws), take the 2 X 6's off and replace with 2 x 12's. The 2 X12 then serves as both your runners and base, giving you 8ish inches of clearance. Bevel the front w/ you jig saw and put a set of down hill or even cross country skis under. Make sure to countersink the heads. Your 2 x 6's wont be wasted, strip them down for your walls. What makes shacks drag good or bad is more due to how much snow they plow and "load up" as much as it is overall weight. 2) If you can't easily take a part, just scab the 2 X 12's to the outside of your base. Since its 6 feet wide already, won't make a difference for transport on a trailer, just adds unnecessary weight. 3) Build a separate "drag frame" to set it on to move it around the lake and off at the end of the season. I've seen people do it this way, I just don't like it cause its one more piece of junk in the yard when the season's over. Whatever you do, make some sort of change now and you'll be much happier when he season starts. Good luck.