I didn't like the original F1 open rc servo saver design so i made a more traditional version.
print at 100% infill PLA .2mm layer.
Some setup notes:
PLA tends to stretch out over time no matter how tight you make the tolerance for the "C" part of the servo saver, so after a while you get some Wandering i recommend installing a large O-Ring over the "C" so that the PLA has some positive spring back while protecting the Servo from damage.
make sure you do not tighten down the top and bottom Counter sunk 3mm bolts you want the servo saver to have a little float to prevent the unit from binding on the upper or lower plate. Ideally it would of been better to redesign the servo saver with a metal post in the center that was Slightly taller to prevent binding but i wanted this part to fit right into the original design without additional parts. I also put a little plastic safe oil on the top and bottom screw mounts to make sure there is no binding in the servo saver. that should help in setting up the servo saver and improving the original steering.
you will need to fabricate your own servo linkage, i used an old Airplane flap adjustable linkage in mine.