My only issues with the sierra gear for the CMP 70 thru 74" is that they should have longer struts and they dont , they are made to fit a 65" plane thru 74" and you cant tell me the prop range is the same .
I have the sierra gear for my CMP 73" P40 and the struts and limit prop options .
I wish Sierra would take the same base format and add a longer strut