Being you have a 310 and I a 30 w/ dinette, I didn't think you had the same location options as I have.I wish you would have posted sooner! I like that spot a lot.
A tech on the Raymarine forum, now closed, recommended between 8 and 12 for hardover time. I set mine to 11.
I set the auto turn to turn the boat 110 degrees.
I have another note that I found "Cruising" mode to work the best for my boat. I believe the modes were Liesure, Cruising and Performance.
Other than that, just follow the set up Wizard. It works much better with the EV-100 than earlier APs and requires a lot less input from the user.
I haven't had the need to change any settings since I changed to the Sail Catamaran vessel type in August of 2019. The AP has been working great since then.
Here is a link to the Raymarine Forum. It's been locked for a few years now but is still available for searching/viewing. It's worth a visit,