9800 Fin/Binding setup

[JAS]

Ok guys need your imput. Have been on 9800 68.5 with front powershell and RTP for about a month. I have got dialed in to what seems like a nice ride 34@28. I am using slot fin to schnitz's specs but when I look at a picture that he has on his web site I see that he has fin way back. I am using a regular dial caliper and somehow my front-back measurement positions fin forward about .750 (similar to Goode fin).  The rest of the story is that my final front binding position is forward .500 of factory recommendation.  I'm obviously out of the normal zone but the ski seems to ski very well. Should I move bindings back to recommended and start over with the fin?

Thanks Jay