Taurus, BME, DA, and 3W all use a similar multi-bolt prop hub arrangement. Don't use aluminum or stainless screws, and use screws that make it to the back of the hub and everything works just peachy. Tighten and loosen the screws in an opposing torqu sequence and props stay nice and tight. Check the bolt integrity after the first 15 minutes of flight and at the beginning of every flight session. If the bolt passes all the way through the hub and sticks out the back a little it harms nothing as long as the excess doesn't hit anything or roll over the Hall sensor. The length of the bolt will have to be determined by the length needed to make it through the prop, hub, and spinner backplate. Since all backplates and prop hubs are not created equal a small supply of various length bolts should be on hand to meet the practical need.

There's no reason on Gods' green earth to change what works very well already.