Stationary Bike 8 plus phone holder

I designed this for my Giant ATX bike that I have setup as a stationary bike with the Wahoo Kickr. There are a couple of pieces that I grabbed from other designs simply because of the good design. I couldn't use their kit with my phone. I also oversized the holder to accommodate the iPhone 8 plus case (its a thin case). Since the phone is just going to sit inside the holder and I don't care for removing my case every time I ride.
My case is 80.5mm X 167mm.
I used M5 bolts (not screws) 40mm lo