I thought that you had to remove the two bolts from the chain cover and screw the tool with those Anyway i ques that the 0 mark of the tool aligns with the arrow of the timing chain cover.

Like gordini8, I had assumed that the tool would be fitted by replacing the two bolts to fit it onto the engine casing. Seeing it fitted like this shows the importance of getting those tubes turned to exact dimensions when replicating the timing tool so it is held firmly onto the bolt heads.

IanEmery said:

Like gordini8, I had assumed that the tool would be fitted by replacing the two bolts to fit it onto the engine casing. Seeing it fitted like this shows the importance of getting those tubes turned to exact dimensions when replicating the timing tool so it is held firmly onto the bolt heads.

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Yes, privately someone has already discussed with me the dimensions I measured for the tubes. If making another I would experiment first before committing to a design. A short length of tube will cost very little and you might even find the right thing simply lying about.
It is and exceptionally tight fit and I suppose my next task is to find something standard myself which has the same tolerance and then report back.:bang: