Would anyone be interested in this?

[Albannach]

Oh right sorry! - So that was a pop at TonyN for not noticing she said it was for a petrol vehicle ?.. My apologies for not noticing your cryptic sarcasm.

I didn't see that either, I only read the last (2nd) page.

[Twisted Instigator]

I didn't see that either, I only read the last (2nd) page.

This is a Gunson Hi-gauge compression tester.
Spec; This tester has a flexible high pressure hose and fits all 14mm spark plug holes. Calibrated in imperial and metric pressure values, you can diagnose worn piston rings, oversize cylinder bores, etc.

Here you go dear. I know it's hard to concentrate for too long when you get older.