after using the bullseye for about 2.5 years, I decided to switch to this, main reason, is I wanted to go to 5015 fans, and if im doing that, might as well go dual! And there huge added benefit of going direct drive, and with the 8mm offset, I don't lose X axis real estate! BTW, I made a SpeedDriveLite mount that works perfect: https://www.thingiverse.com/thing:4771163, uses less plastic then the regulars, and from what I can tell, its just as strong. There used to be a SpeedDriveLite for the bullseye, but I can't seem to find that one anymore, that is what mine is based off.
assembly was a bit of a pain at first, just small bolts and what not, but end the end, I really like how I can pull the fan, and then just remove the entire assembly. works great, and looks bad ass!
Overture PLA PRO
printed with extra walls on the mount for added strength.