6 Cylinder Lego Pneumatic Engine (LPE) - Green Gecko by Green Gecko https://rebrickable.com/mocs/MOC-15816/Green%20Gecko/6-cylinder-lego -pneumatic-engine-lpe-gr…
Alternative LEGO Power Functions Motor Set (8293) – Green Gecko Workshop
WIFI LEGO RC Combo - 100m Range 2.4GHz - Green Gecko Workshop | eBay