Has anyone installed any type of ski guide to their trailer? I recently purchased a 26' Mirage trailer to haul 4 sleds. First three are easy to load with plenty of room to drive sleds into trailer, and then muscle around if they did not go in perfectly straight. The 4th sled is a bit of a problem especially if the trailer is not on perfectly level ground. The 4th sled tends to slide into the side of the third sled, if you are not perfectly straight. Mirage shows some kind of a ski guide on their website, but nobody could tell me if they actually work. Any help or ideas would be appreciated.