The Lawn roller may be useful in other areas than just lawns. The lawn roller can be helpful with sod as well as some soft surface application. The lawn roller should not be used on gravel lest the rocks puncture the polycarbonate shell.
We do not recommend using the unit in reverse except when necessary. The towbar was not designed to handle the weight of a full roller in reverse.
Yes, you will need to drain the roller completely and store it without the plug-in place. Changes in atmospheric pressure will cause the unit to warp if the plug is left in for storage.