I have been using an Aluma 638 Aluminum Trailer since before 2016 to haul one of my two Ural Patrol sidecar rigs when camping with the URRV.
I've pretty much put the thing through terrain and situations that it wasn't really designed for and which aluminum just couldn't withstand long term repeated stress.
Stretching the trailer's tongue by two feet to gain clearance distance didn't help as it most likely added undue stress where the beam mated to the trailer bed's longitudinal support beams.
Along with stretching the tongue and gaining clearance, carrying the TW200 on the forward edge of the trailer bed didn't help things either!
Not supporting the rear edge of the trailer when doing loading/unloading operations didn't help either, something I learned about today thanks to RichardM.
I'd tried having additional aluminum welds to secure the tongue to the beams under the trailer....so pretty sure it wouldn't come off but the cracks in the beams themselves caused worry:
So, I'll be traveling with a couple of small jack stands to use when loading/unloading the sidecar rig onto the trailer. This should alleviate some of the stress when a 800 lb sidecar rig is driven onto or off of the trailer!
My next trailer, will be a steel trailer....yep, much heavier but stronger. But not anytime soon, I hope.