Thank you for doing this, as I am new, I hope this could help other freshly new users: All videos show how to level on a ff with the leveling bolts 2 in front and one in the back, as the pro has one in front and 2 in the back, also inserting the thingiverse shim to install a glass plate ( that was ordered through FF USA ) from start to finish on a pro, so we can see that it doesn't ram into that sensor thing, I guess I am just scared to try,. thank you so much.