A little out of place here on the Case/Ingersoll forum, but this is also about the right tool for the job ... true? Professionals are using another tool made really popular in the past few years ...
Commercial quality (just like your Case/Ingersoll ...) leaf blowers can do an awesome job, very fast. For lots up to 1 acre, with lots of trees, I think they are a quite cost effective approach, despite that many people can't get their mind around spending $$$ for a really high quality, capable tool. Sometimes, put in the context of a 'tool opportunity' it really makes sense. IMHO, the little hand held ones, even the good ones, are only really suitable for cleaning out landscaped areas.
Take a look at the specs on a Tanaka TBL7800 ... they can clear a LOT of ground fast. Once cornered, it is easy to pickup, shred, or use a mower to mulch them (such as the rear discharge, backwards).
http://www.tanaka-usa.com/Merchant2/mer ... e=TBL-7800
List price on that commercial blower is $629 ... we've got access to several dozen, at annual close out pricing of $459 plus S&H (22 pounds) (limited time offer, of course) (sorry, the R throttle configuration models sold out in about 3 weeks ...)