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Following my failure to get the PV Productions GBC10 Ferris wheel to function I set out to build my own creation using the GBC10 idea as a starting point. I chose to drive the ferris wheel via chain drive with a 72:1 reduction from the M motor. Loading & unloading is done by trip arms not via a gear train and lever arrangement. Getting the correct locations for the trip pins / rollers was a lengthy trial & error process but eventually got them working OK. A ball return was installed to allow for continuous running. The GBC is mounted on a 28M x 56M baseplate and will eventually be linked to various other GBC modules I have built to form a longer GBC ball run. I used the new PV balls as they performed the best - I have some Lego balls from the Maze set and white balls from Itsy but they tended to hang up. The Lego balls have a marginally bigger diameter and sometimes would not pass through the loading gate. Occasionally balls stick due the small hole but next ball along sets it in motion again Video: General view: Oblique view showing M motor drive via 72;1 reduction then chain drive to ferris wheel. Side view showing chain drive: M motor via 72:1 reduction then large Lego chain to rotate the ferris wheel. Ball loading mechanism: Operated by a trip arm activated by rollers on the ferris wheel arms and with an adjustable linkage rod to set correct time for the ball gate to open. Ball guides added both sides at the loading point to ensure balls don't over shoot. Ball unloading trip: trip arm on bucket unloads the ball. This took a lot of time to get the ball discharge ramp in the correct position, used studded plates to get 1/2 L offsets.