RE: WHAT PROPELLER SHOULD I USE?
when going doen to a 3 blade, a good rule of thumb is down an inch and up in pitch. example: 12x7 2-blade 11x8 3-blade <-- this is what I used with my .61 FX. I also used a master airscrew prop[link=http://www.masterairscrew.com/GoCart/itemlist.asp?RootID=7016]Master Airscrew Prop[/link]