We have a 2015 Winne 36Y and it's the best tracking RV we have owned. I would spend the money on having the toe-in checked. Small deviation there can make a huge difference in handling without affecting tire wear. The fact the previous owner put on safety steer makes me suspect something isn't to factory specs. The F53 is a chassis that's been around forever and it's strong and simple. No reason for it not to track straight down the road. Caster and camber is built into the solid front axle and is virtually impossible to be wrong. Also have the kingpins checked for wear when it's on the rack along with tie rod and drag link ends. That new, I'd bet on wrong toe-in.