My way of holding a ruler while using a knife to cut leather 

Thank you for this Al. As always.

Thanks Al.

Exactly the problem I've been having! Thanks Al!

Great tip even with cork on the ruler and just pressing down it will shift a bit. Love this tip.

I was about two or three minutes into the video before I realized that you WERE using a cutting board and not marble. The lines and cut marks in the surface made me think veining in marble! LOL