Several years ago it used to be generally accepted that a 3 blade head would be easier to tune for accuracy than a 4 blade head, at least I found that to be somewhat true many years ago. So I have lived by the 3 blade with good success and confidence. But with the advent of the new smaller heads they will fly inheritantly the same. Here is what I like with the new smaller fixed blade heads.........you can have the same or very slightly cutting diameter with them as with a larger head, but with less resistance because its shorter.

Glad you like the new MX-4's, am thinking of giving them a try as well as Slicktricks, to go along with my regualar Muzzy 3 blades and the Rocky Mtn. Turbos I used last season.