Hi Rossan & all the guys ,
unfortunately I have not jet test fly my PREDATOR :-((
So I can not to get my opinion about :-(
To mount the OS91 SURPASS III I used the original OS
alloy mount re- drilled to fit the clearance .
It is mounted off center to get 2.5 DX degrees .
Te do it I arrived to the extrem Sx . of the firewall !!
Nico