[Richard]

When diagnosing my Yanmar generator issue, I had the need to check the compression on the engine. So I built a compression tester using an old injector. 

Here are pics. 

If you ever need to borrow it, let me know.

[bestgenman]

Nice addition to the service tool collection.  Good for checking carbon loaded valve seats!

[superbirds]

What a cool idea - well done