One step forgotten in the quick DIY instructions is to fit the alignment pins (4mm) into the cams so they don't move.

There are 2 holes in each cam spray bar above each camshaft...
One hole in each bar lines up with a pin hole in OEM camshaft at correct TDC
(RH hole - intake / LH hole exhaust)



Not critical, but it's a big help for those a little green or unsure when working on engines
Hope that helps