I do the 90 and 90

another thing to consider is the stiffness of the push rod.
If you're using wire type rods, sometimes it'll bow if the jacket is not long enough(during push or opening).
you can add solder to the wire to stiffen it. Or go to metal type push rods and spend a little more time to
make proper bends to minimize binding.

Sometimes the set screw binds againt the carb's barrel groove. this will give wacked throttle reponse.
Sometimes it'll stick, sometimes it won't.
This is where Magnum engines give me the most problems.

you'll notice the same problem with the rudder as you progress.
it's always stronger when the servo is pulling.

a Z bend plier is nice to have