Here's a unique and functional way to remove wt. from up front........I'm testing the twin blade 4150 stuff from GET'M Garage that Mark W. has posted pics of and they are a few pounds lighter than a Dommy and my initial testing is proving how bad azz these are. I will track test asap and they range from 600 cfm up to 1600 and these puppy's are taking over and winning races............