Thanks guys, mostly thanks Don if you read this for the opportunity to build this for you. Here is some of the logic behind the trailer.
The trailer is small but bigger than it looks, you can fit a full sized ATV in it along with a pile of gear (lid would have to be off to fit ATV).
Hinged front because of the strength advantage and the access advantage, think out of the box for a moment when it comes to mounting a RTT and you can still pop the top more than enough to get in. The rack is STRONG and you could easily open a RTT over the hitch and still have full access.
Stress on the aluminum is minimal, the hinge plates on the box are huge and have backing plates, the rack is hinged and the lid attaches to the rack so all the lid has to do is keep dirt out. Aluminum has a low cyclic rate and almost every stressed component is frame mounted, the entire frame is powdercoated to reduce disimiliar metal corrosion. All hinges have polyurethane bushings to reduce vibration which can cause damage.
I cannot take the credit for the tub forming, Ryco Custom Metalworks does all of our forming, I have no room for a brake and shear. Colin did an awesome job as usual building the shell.
All Aluminum is 5052 .125 thick. Frame is a combination of 2x2x.125 and 2.5x2.5x.215 seamless steel tubing.
The entire structure is designed not to flex, the frame is all box tubing and very rigid. A little softer suspension might be down the road but thats if and when it shows the need.
The trailer empty weighs about 600 pounds and tows super easy.
I won't disclose what my customer paid, I gave him a break because he is always a pleasure to deal with and we have done a pile of work for him over the years, and we did it between big jobs. It carries a $10 000 replacement value, and if a guy could build more than one at a time you could probably trim $1500 off of that. A kit form would be the cheapest because any body that does completed detailed builds knows the last 10% costs 90% be that time or money!
Cheers,
Mark.