Okay guys, a Bushtec it's not, but I think it has some possibilities.
This picture is before I did the cooler mount. The original tongue was a bit short based on what I've read. I lengthened the tongue about 14" and this should help to cut down on tongue weight too.

Obviously the hitch etc. I decided, at least for now, to go with the stock solid ball hitch, not the swivel tongue hitch. I did a couple "U" turns in my street at full lock on the steering without any binding. I had my neighbor watching the hitch to see if I hit and he said it looked good. I know that I've seen guys like JC carving turns with the trailer attached and I know in my case doing the "U" turn, I was not close to dragging my running board, so actual road speed turns may allow a bit more of a bank on the bike, but for what I'm intending to do with the trailer over the next couple weeks, I feel save in leaving it alone for now.

Here's the rear and the spare tire mounted.

A better shot of the spare tire mounted to the rear cross frame of the trailer. I was going to mount it under the front on the tongue, but it added more tongue weight. So to the rear it went. I can check the air pressure without removing it too. A by product of the rear spare tire is that if the trailer is empty and I lift the tongue and walk the trailer up in front, it will hit on the spare tire and then tip back until the back edge of the cargo box hits the floor. At that point the trailer is balanced and is quite stabile. So storage in my shed should be a bit easier than I thought it would be.


I made up a little kick stand out of a couple pieces of aluminium extrusions to keep it light. It turned out okay and seems to be strong enough.

Other than not having any bungee cords tying down the cooler, here's the trailer finished ready for the road.

The trailer is designed with about 1/3 of the cargo box rear of the axle and 2/3 in front of the axle. I figured that it may be a bit of a packing issue to keep the tongue from getting too heavy.
I've read that tongue weight is anywhere between 7% to 15% of the total gross trailer weight. So I think I'll be shooting for around 40# max tongue weight.
What do you guys do to calculate the tongue weight? Or do you just fill up the trailer and say good enough? I plan on having the cooler empty, or maybe just light stuff in it, not ice and beer/soda etc.
For now with the spare tire, I have about $350 invested into the trailer plus many hours of my tinkering, like extending the tongue 14", the spare tire mount, kick stand and cooler mount. On the bike I have the Bushtec hitch I bought off eBay and wiring harness etc. In that I have around $350 as well. Of course plus my labor. I think labor is free. At least that's what I've learned over the year of marriage. She always tells me I'm worthless, so my labor has to be free...

I'll be leaving for ES mid Saturday morning, so three days and I'm on my way.
Any advice on tongue weight and loading etc would be a BIG help.