Tom, It was funny, out of the 4 props that I initially got, two were balanced without any work, one needed some, but very little, and the fourth is garbage. Wood is so inconsistent that you never know what you'll get with wood props. It's just luck of the draw on what you'll get and what it takes to balance it when it comes to wood.
When Brodak sent these props, they also included their full catalog. I think the catalog cost more than the props (By the way - thee catalog was free). The catalog was big! I noticed in their catalog that they offer Rev-Up props as well. The Rev-Ups were less expensive than the Y & Os (slightly). I thought about contacting them to see if they have the Rev-Ups in stock. The Y&O props are very simuliar to the Rev-Ups (possibly even the same though I do not have a Rev-Up right now to compare them). Tom, since you've mentioned that you ran the Rev-Ups, I will be curious to see how you compare the Y&O with the Rev-Up.
Kevin