Ron,
I have been using FD blades New spiral and like them a lot. One of the best thing I like to do when cutting with them is to use them also as a power rasp. With good blade tension and workpiece control you can fine tune your cut and fix minor oops that happen when you loose concentration or get momentarilly sidetrack while cutting. ( I use only my finger tips to direct my work piece as I find it reduces excessive pressure or side to side movement.). No special Blade prep other then using the recommended bit size for the holes, which sometimes requires a little extra effort to insert the blade. I recommend only top feeding on patterns of this magnitutde as finding the hole bottom feeding would be nearly impossible. I also tried spiral reverse blades on half of this cutting although the performance was not as good as the new spiral they did ok and did reduce the amount of fuzzies on the back, but I still prefer the FD new spiral of all spiral I have tried. Like I said 95% or better of this pattern is very stable, normally I tape all of my cutouts back in but did not tape any in for this.
Mike