I bought a multi keyed timing chain set with the intension of precisely timing my cam while using a degree wheel.It was disapointing when I realised that I could not dial in my cam to the exact manufacturers specifications due to the limitations of the this design.In the end I ended up choosing the "straight up" keyway knowing that was the closest I could get (1.5 deg. adv.) to the manufacturers specs.If I had the money I would go for an infinitly adjustable timing chain.Good luck!