Not adding anything to the conversation, but I had purchased a Nimbus 4 that had a Pfister (spelling?) tube trailer. The tongue weight was so heavy it could only be moved by a jack. Soon after getting the bird I purchased a double axle Cobra trailer for the glider and sold the other trailer. The new cobra had a tongue weight much less than the former trailer and could be moved by hand and towed marvelously. Of course back then I was towing with a 2500 chevy Suburban and I had to put a post it on the dash to remind me that I was towing a trailer. While not an expert in any field of this particular discussion, it seems tow vehicle has much to do with the stability as the trailer. My ASw-24 towed towed great behind my little four banger Toyota pick up and horrible behind my next car a Jeep Grand Cherokee. The Suburban was my favorite tow vehicle but I had to keep reminding myself of the trailer. I am currently towing an ASG-29E with a ML 350 diesel and it tows great, but I do have a double exile trailer.