Hi!
If you live at sea level you better use a 11x5 or a 11x6 APC prop and do not use the plastic spinner. A 10x5 prop is to small and will only make your engine rew a lot producing a lot of noice but not much trust. Never use a MA prop as those are noisy and do not produce as much trust as APC. Also remenber to balance your props (sanding on the frontside, never on the back so that you change the picth).
When it comes to plastic spinners ...you better leave it off....Better to use a aluminum spinner nut or a aluminium spinner (from Tru-Turn).
Also use 5-10% nitro in your fuel and a OS 8 or Enya 3 glowplug.

Regards!
Jan K
Sweden