The pix are at
http://www.wera.com/grpahics/showhauler all of it that starts with trail (there are only 3 right now I'll upload more if I can find them).
Trust me on the trailer, you can put everything in it an it will not push the truck around. This ain't your granpda's oldsmomotorhome
If you're really concerned then keep the twin screw idea for better braking, I may do that on my next one as well. My trailer is 24' and weighs about 12k with the Jeep and gear and bikes in it and it has no effect on the truck at all.
On the stacker idea, you can get the right size from Renegade and then add a lift if you need to later, just a thought for saving some up front money.
Sean P. Clarke
WERA Motorcycle Roadracing