Sanwa servos are a touch shorter between mounting holes than KO and Futaba, so it could be a little more tricky.
That said, I know Si Moss runs for Sanwa, and I think Grant runs a Sanwa servo, and I definitely had a Sanwa in my prototype car - so they can definitely be used.
I actually ran the plastic blocks (and steering cranks for that matter) at the last national of last year, and the British indoor open thingy the other week. In the face of it, they seem quite strong. I hit a car very hard down the main straight in my last run, which in turn fired the car straight into the wall at the end of the main straight. Blocks fine, wishbone broken!
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Matthew White
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