I would rather buy a prop than a finger/arm...(insert extremity here). Putting TDC at 2/8, or something close, is what I do for safety. I hand-prop all of my planes because ..... I have to.

Once, in a hurry, I mistakenly installed a prop at 3/9. It scared me so much that I flew once and re-installed the prop before the next flight.....comfort is comfortable.