What prop should i put on a CMP Zero 1.20 ? it weighs about 5kg complete id say. Im using the standard pitts silencer from mvvs. I was to buy a mejlik and since they are expensive i dont wanna make a wrong choice. Could you please advise?

Does anyone have any numbers on rpm, since this engine is pre-2008 it has to run 8k rpm on the ground. Im interested in scale flight with good speed since its a warbird vertical is important but not so much to me. Thanks in advance.