I have a '96 GMC 2500 that has a single reciever set-up on the front. I'd like to find (or build) something I can haul my '91 XT 600 on. This bike is HEAVY, I'm thinking at least 400 lb. I'm a little concerned about that much weight on the single reciever. Did a little snooping around online and it looks like most are recommending a double stinger for the heavier bikes. Anyone have a heavy bike that they haul this way? Cooling is another concern as well...