LewisT, you are right I am inexperienced. Hence doing as much research as possible. I'm planning on trying it on a SORNed fiesta we have first, at least if that goes wrong we'll just send it to the scrap heap before trying it on out family car.

There's a lot of information here guys and it's all very much appreciated. The photos are particularly useful.

How do I know if it's at TDC as when piston 2 and 4 is up I'm assuming the cam bar will fit as well?

Any other relevant information you guys have to share based on your experiences also appreciated