I have the TT126 and have towed with my 90 or Discovery loaded with not much difficulty, just have to remove the ladder bar for the Discovery. I've towed the 90 from Surrey to mid Wales a couple of times with no dramas, COG is higher but the trailer is still pretty stable. As above, it is heavy at nearly 1.2t plus with the 8' steel ramps but is strong and a great workhorse. Mini diggers, aggregates, rubble and Land Rovers no problem.