Just printed the v3 Design and wanted to mount it yesterday. Problem was the mounting holes for screws. They were simply not stable enough, and I really did not used much power to tight them. I printed only in PLA and it broke before i could reinsert it into the Mega Case. Perhaps you can design them a bit more stable for the future?
And with only two screws, it does not feel very stable.
But the design and idea is great, thank you for this :)