i absolutely love my m762 (3/4 ton, flat bed version of the m416)
that being said, im slowly working on plans for a new trailer. although, mine will be a bit beyond the typical m416 clone that most people try to do. it will be somewhat of a popup tent trailer type camper, just in a super small, offroad package. if/when i ever get to that, you all will be the first to know.
if i was to do the trailer thing all over again, i would build my own from scratch. i didnt have the time to build one when i needed it, so i bought one, and i am not disappointed by it. it is very difficult working around something, and much easier to figure that into your initial build.