I've decided I want the black pearl monitor receiver setup for my Phantom 2. I currently have a goPro 4 silver, Zenmuse H3-3D gimbal, mini iOSD, AVL-58 transmitter. Question: which black pearl do I purchase? The 7 or 32 channel version? I want to try it with the AVL-58 since I bought it used and it came with already. Thank you!