I am the STC holder for the three bladed mt props .
All of the upsides are true :

1) you gain approximately 60 lbs of useful load

2) the noise reduction is significant to the point of amazing

3) sync problems are a thing of the past

4)takeoff roll reduced significantly

5) front boots are available

6) mt has an overhaul facility in Deland FL and will be opening more shortly
7) Sorry about email thing try me at lesb43@hotmail.com or call me at 919 658-0064 for the rest of the story.