What I often do is make a hole clear through the large diameter part of the prop hub, and then use a Phillips screwdriver through the hole to tighten the prop hub. And yes, knurling the face of the prop mounting surface is almost a must. At this point, you could just glue some # 220 sandpaper to that face to help keep the prop from slipping. That will work too.

I strongly recommend using Loctite both on the threads where you thread the prop hub on the engine, and on the stud you will use to hold the prop on. Loctite is not needed on the prop nut itself, and not desired.

AV8TOR