Ich habe detaillierte Fotos genommen, auch für Eurobricks. Hier mit Englischer Kommentar:
Launchpad with two rubber connector to ensure good grip when launching the ball with the wheel, at the right the two axles that keep the launch pad in place when mounted:
Bottom of launch pad with two neck braces to create a good ball entry/exit and wedge shape under the wheel so the wheel 'eats' the ball always:
The row of rubber connectors where the launch pad sits on, the launch pad can go nowhere when everything is mounted:
Shot from other angle where also the axle is visible that runs up to the wheel through two smooth joint pin connectors (48496) on both sides:
Here the launch pad has been dropped in with the neck braces on the exit side to create the wedge shape, the yellow axle with 4 rubber connectors hold the launch pad down:
Bottom with gearing and two axles going up through the smooth joint pin connectors (48496):
Side without the liftarm holding the wheel down showing the 4 pins of the 2 smooth joint pin connectors (48496):