Ordered two sets yesterday with free shipping, and they arrived today! Wow, that's service! They even come with a set of 4 spare nuts. The built-in nuts appear to be snapped into place, not glued, because there are 4 tiny flanges extending very slightly over the base of each nut, as if to hold the nut in place... but I'm not sure about whether any glue was used... anybody know for sure?
My Solo flipped earlier this week- only from a foot or so- My Master Airscrew Props went unscathed because of those nuts-
but it is a little inconvenient gluing in the nuts- but they sure are sweet and a great value. Another nice point is that Master Airscrew will have sales throughout the year- I get emails from 10% to 15% off and always order enough to qualify for free shipping.