If anything is weak on the Zen STOL's it's the nose gear and the bungee! I don't like it, never have but since I'm going to put on amphibs in the near future I was never too worried about it. I've had issues with Jan but this is one of his better ideas. Reports are that milling the block causes no issues, but if you are worried about it I'm sure you can leave it as is. The steering (rudder) is tight while the weight is OFF the nose, it's actually easier to move on the ground. The pre-load option makes it easier to move in the air. I'm looking at getting this, but I'd probably leave the notch in the block anyways. If it's greased up well, it's usually not that bad. My $0.02. :)