Hi, I am new to the world of electrics and have a general question on my set up. I am flying an Ultimate (E-flight) and utilizing a HIMAX brushless 4100 (20/15) geared to 66:1. I am using a 18A castle creation thunderbird and a 3 cell 1800 Li-poly. I am also using HS-55's and an Electron 6 RX. As far as props go, I used an 11x4.7 and was thinking on a 12x3.8. The first prop listed was pretty darn good but what would the second prop do for me or am I way out to lunch on my prop selections.

Thanks for you inputs,
Brian