I like to have my prop at 1:00 when you are at the start of compression. With the DA50, you can turn the prop hub by hand without the prop on it till it comes up on compression. The magnet on the hub will be at almost 12:00 or 11:00. Check and see where the bolt holes are on the hub, then put your prop jig in your prop from the rear in the same position. The DA prop jig works so well though it really doesn't matter which side of the prop you drill from. You'll want to bolt the jig to the prop with 1/4 x 20 bolt and flat washer. That keeps the jig from moving while drilling all the holes. I use a #5 bit. Oh, one more thing. The DA50 center bolt is 10 mm. In order to use your drilling jig, you'll first have to drill out the center 1/4" hole to 10mm. B&B makes a real nice bit for doing this. It has a center pilot shaft that is 1/4" and the outer portion is 10mm. If you don't have this type of bit, it's very hard to drill it out without getting the center hole off center. If you don't have this bit, you are better off to use a step reamer to keep the hole centered. It just doesn't take much to screw it up....... Don't forget to re-balance after drilling the prop.

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