Best Jackplate size?

202 pro v with 96 200 EFI Merc. What's the best size manual Jackplate for this rig. Just wondering if I'm losing any performance from only having a 10" setback

I've always heard 15" is optimal

15

This is good information. What about a 190 ProV with a 200 optimax?

Brad

15" for 190 as well

Thanks for the info and time guys