I would say it would be worth it for the benefit you will gain in tracking especially with wind.
If you don't have inserts you may still be able to install the rudder. On the back of the Xfactor, do you have a small circle in the rear of the tankwell and/or enough room to install a 4" hatch? You can install the hatch after cutting the opening to give you access to thru bolt the rudder bracket with bolts and lock nuts on the back side.
Kerry
OEX MB
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