It looks like I have purchased a 24' enclosed trailer and with the price of diesel skyrocketing I have started looking at ways to get a little better mileage. Don't tell me I have too much vehicle for such a small trailer or I should buy a hybrid

I am wondering if anybody has experience with either a Nose Cone as found here: http://www.nosecone.com/aepull.htm
or airtabs as found here: http://www.airtab.com/ or both?

There are some rv guys who have built their own that claim a 1-2 mpg increase in fuel economy. Those guys have used FRP over a PVC or metal framework to build sort of a "nosecone" style device that doesn't have the elegant curves.

Any thoughts?

Thanks