I use an 11x5 Master Airscrew. Flies it VERY well and keeps it slow when you bring the throttle back. the 11x6 is definitely a bit faster. I would say get used to the plane using the 11x5 then eventually step up to the 11x6 when you feel ready. Go with the TT46 if you feel its right for you. Should provide comparable power as mine, so it will FLY GREAT> Def do the Sullivan tail wheel and dont forget to reinforce the landing gear area with epoxy. Ive had some very hard landings and totally bent the gear, The fuse area never failed. its worth the little effort it takes. For knife edge you will need to place the clevice on the inner most hole on the rudder's control horn. if you have any other direct questions, feel free to PM me.