We used to put the heavy blade on the counterweight side of the old Fox .35s so your hand wouldn't tingle at the end of the flight.A cheek cowl was needed too. The newer LA .25 does not need this at all. Of course it was not designed in the 1950's. It is a bit windier at the new digs, so I have to use the bigger planes, or I miss the whole season. The carb shook loose on the FX .46 in the test and the screws fell right out.