Also: "I see you are trying to print a hollow cylinder. Sorry, you can't print gun barrels" Also: "The Letter_C.stl can't be printed because it is an 88% perce

Also: "I see you are trying to print a hollow cylinder. Sorry, you can't print gun barrels" Also: "The Letter_C.stl can't be printed because it is an 88% percent match for a gun trigger"