I am new at digital photography and using my F717. I just received my F32x flash from Sony, so I have a few questions. 1) the flash came with instructions to put a piece of clear tape (supplied) on the camera flash shoe to prevent "rub wounds" on the shoe. The illustration is a drawing of a camera that looks like the F717. Is this tape necessary on a F717? 2) Which is the best "Mode" A, B or Manual to start out using on the F717? Thank you.