One of the reasons APC are so well balanced is that they have hardly anything out at the tips (Which is why the tips break off so easily) Personally, I avoid using them. I've tried them, and I'll use one now and them, but I just don't see anything special about them - combine that with the fact that they break at the drop of a hat, and I'm just not sold.

Now if you guys want to try a prop that will pull stumps, try a Graupner.

I don't think these things get nearly the publicity that they should. I use them almost exclusively on my 4-strokes. They cost a bit more, but (to me) they are worth every penny.

Also, they have some weight to them. This translates to a flywheel effect which will give you some increadably low idle speeds.

Try a 12 x 7 on a 70ish 4-stroke, or a 13.5 x 8 on a 90ish 4-stroke and you'll see what I mean.

If your LHS doesn't have them, you can get them here:

http://www.hobby-lobby.com/grprop.htm