Thirty years ago, noone used Master Airscrew props on pattern airplanes for two reasons. First they were known to have a tendency to throw blades and secondly, the blade shape was very inefficient and the blades flexed too much. I'm sure the materials used for Master Airscrew are much better now and less likely to fracture but I don't see much improvement on blade airfoil. We used mainly reworked Zingers and TF Power Props.
When APC props came along, they took over the pattern market by producing a safe and very effective product at a good price.

Boiling was to reduce stresses in early nylon props such as the Tornado and TopFlite. Later we were told to bake them rather than boil because the water weakened the prop. Not sure that boiling or baking will do anything for APC which are glass filled nylon resin props, which I assume the new Master Airscrews are as well.

A quote from APC to keep in mind
 <font size="2">"</font><font face="Verdana,Tahoma,Arial,Helvetica,Sans-serif,sans-serif" size="2">In summary, please abide by the safety practices recommended by propeller manufactures. This is especially important for high performance propellers. Assume that propellers can fail at any time, especially during full power adjustments on the ground. Never stand in or expose others to the plane of the propeller arc. </font><font size="2">"</font>

John