I feel I have to inform you that I have just removed the Tower 75 from the SSE and installed it on a Shrike 40. I haven't decided on a prop yet but have alread installed the only prop I have which is an APC 12X8. Would anyone care to guess what the top speed will be? I know it will fly faster with other props but don't want to buy one now. I was thinking about the 11X11 or 12X10 but will give it a shot with what I have now.