Is anyone using it in a build and if so, could they answer me a question.  Will it take motors that use a 12x12 mount pattern or is it 9x9 mount only?

I believe it is the same cut as the VX3.5 which has the elongated holes and will fit 9x9 up to 12x12. If your motor has fat c-clips (like the T-motors) then you may have to drill out the center hole to get enough clearance.

I knew the 3.5" had 12x12 mounting, just wasn't sure if the 3" had the same mounting holes. I'm going to try the VX3 for the 1408 build. Thanks