These are great suggestions guys! Thank you!
I thought I was going to tie up my iPhone while trailing, and I like to use it videoing forward to record the trail. The one you posted has a dedicated screen, and if two end up being needed, I can just put the little monitors both in the spot shown. In the higher center part of that area is where the iPhone rides. I just got through ordering one. If it works out I might add another if necessary. I might make some sort of cage to protect it, or mount it so that I can see if it’s about to be hit. None of this theory may work in practice, but it’s a great starting point!
Thanks!