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So I should be leaving it to run that rich since no eflex sensor?

I've been filling from the same station for 2 years and its been really consistent. Its been causing Fine Block corrections upto 1.4 degrees due to the rich condition (I know this cause its leaner now and has much less severe FBKC) and idle has the slight hesitation sometimes.

My intentions were to get it fine tuned for my station but still be slightly rich for safety in case.

Still unsure as to why it reads -6% LTFT when its clearly running leaner than Commanded AFR in some instances

Edit: If e85 consumes 30% more fuel than e0 then e70 would consume 24.7% more than e0. 5.3% would be the fueling error if I put e70 in a perfectly scaled e85 tune. Im guessing this is how it goes