Has anyone tried using a performance timer? Like the beltronics Vector FX1? Here's the site.. http://www.beltronics.com/fx.html I was wondering if it gave acturate results and was worth the money...it's only 150 so it's not that bad. I wanted to order it tonight, but i thought i'd wait to see what everyone thinks of it check it out... http://www.beltronics.com/fx.html