For example, Charlie designed the Type II fork to have an ultra-stiff crown to which the rollercam brakes would be mounted, but very thin blades for a compliant ride. To get those blades, one-inch diameter double-butted Ishiwata toptubes were cut in the middle so the fork ends were just 0.7 mm thick where the dropouts attach. Steve then built-up generous fillets so everything flowed smoothly into the steerer, with scallops on the ends of the crowns and at the dropouts for more artistic flare. source