Thank you, I have done so without a double boot use BerryBoot and so far things are going well with 4.1 Retropie setup. I will know tomorrow if MAME configuration for controller 2 is working properly. The auto mount for USB works fantastic.
Is there a way to easily copy all my saved "scrapings" for my game on this new version without running the scraper from the database again? Maybe somewhere I can copy from my USB drive that was mounted properly to the old 3.6 Retropie version. All I saw thus far was that selph's scraper won't work with USB drives, and hate to run the other way again as the integrated scraper kept timing out (although worked on mounted USB drives). If selphs scraper now works with the December 30th updated version to auto mount the USB using file "Retropie-mount" folder then i can go that route too. Thanks in advance for anything you can offer