Bike Trailer Designs

[wapiti_will]

For those who have build or bought a bike trailer and have used it under heavy load, I'm curious how you're experience was riding and how the bike/trailer performed?  I'm building a new trailer this year that is lighter, and my last trailer was narrow and had a rear axle mount.  Just wondered if anyone has tried both rear axle and seat post mounted trailers and can make a recommendation as to which one performed better under heavy load.  I had some issues with the trailer wanting to roll when breaking downhill.

 

[GoatT]

I don't know about a bike trailer but I am looking at building me something like this:

http://www.packwheel.com/index.asp?Id=4