I would be hesitant to run it without the spinner if your spinner has the little close outs behind the blades. I would be afraid they would bend out from centrifugal force. Replacing them would be more time than just putting the spinner back between tests. (If the entire spinner and fillets come off, then it’ll be ok to run.) you could also leave every other screw out to save time between run tests, but a drill set the clutch to 1, makes simple work of pulling and installing the screws.
The last two hartzell props took 2 1/3 turns in on the center Alen key. I would start there and will luck, you’ll get it on the first try! I like 2650 RPM static, you’ll get 2700 at about 50 knots