There must be a little more to it than simply stopping the housing from rotating.....

I made new rear mounts for my Caltracs that added 2.5" more "arm" to them - and dropped my 60' numbers by 2 tenths without changing anything else. I'll let some experts tell us why it worked - because I'm one of those "try it and see" kind of guys. I don't necessarily HAVE TO understand all of the science behind it. I try it anyway.