Installing a Bluetoothcontroller for RetroPie

I originally purchased an SNES controller manufactured by 8BitDo: https://www.amazon.com/gp/product/B00Y0LUQFE Unfortunately, the bluetooth function was not reliable and kept kicking out after 20-30 seconds.   As a result of this failure, I tried out a PS3 bluetooth controller.  Followed along with this tutorial: https://github.com/retropie/retropie-setup/wiki/Setting-up-a-PS3-controller   It mostly worked.  Whatever you do, do not follow along with…