What would concern me is the huge pedal force required to do a rapid L and R full-travel-all-the-way-to-the-stops check.
That's your aeroplane, your nose leg, tyres, cables/torsion rods/linkages (not familiar with TB20), rudder assembly. You treat it as you see fit (....and as always iaw POH).
Whatever the POH says, if it were mine......
