I wonder how much higher the steering effort is with a high caster design? Your front weight should be very light so maybe not an issue.
I think a lot of Ron's steering geometry advice here is based on Pro-Touring use, Autocross and track. For Track only, the turns are not as sharp and I think Ackerman is not as important to get exactly right. Going to rear steer is helpful in allowing you to move the tie rods away from the rotors.
Unfortunately Performance Trends does not predict CG that I have seen. I wish it predicted front end dive for a given G deceleration, that would be nice.
Your front RC looks high at 4.49" But make sure your RC does not go below ground level in dive.
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