anyone know about zeppin racing pinions?
"Zeppin Racing have released a complete line of hardened aluminium pinions. All pinions are 100% precision machined from aircraft grade aluminium and lightened, producing lower noise & rotation mass and enhancing efficiency. Their 2x thickness hard coating reinforces the surface hardness which provides extra strength and durability. All pinions fit on 540 size motors with 3.175mm shafts and are available in 64 Pitch (18T-52T) and 48 Pitch (15T-40T)."