yep thats about it. It takes all of 10 minutes to drill the air jet passage way out and swap the emulsifier and main jet. So for me it was a no brainer. The mod is a one time deal and there is no going back once you make the change (as if anyone would want to). So unless a person can drill straight and stop before passing thru the main jet bore and drilling out the other side then they may be better off letting them do it. either way it's way up there on my best bang for the bucks mods.