Some of you may allready know about this site but i stumbled across it howstuffworks.com
http://auto.howstuffworks.com/.....plers3.htm
many topics like how gross trailer weight works, how tongue weight works, what is base curb weight, how hitch couplers work & how to adjust them, there are like 15 really great plain English articles on this site that can probably help the new and old pup/trailer towing operators. After reading the tongue weight article I finally understand how it works and why it is so important to have it right. take a peek when you get a chance.
http://auto.howstuffworks.com/.....weight.htm

http://auto.howstuffworks.com/.....weight.htm