Schumacher have stopped supplying the Ultimate racing arms, but yes - they are identical to Fastrax.
They do flex, but ive been using one for 9-10 months without issue (the Ultimate racing one too). I have also used the KO arm whick looks identical, on my spare Cat (which ive now sold), and the KO arm seems less flexible and ive seen people break these, although again ive never had issue with this version either.
Chris
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