This little jig looks pretty handy.

 

I saw this before.  His fit wasn't the greatest.  I think it could be with a little more effort and thinner lines.

Pretty cool, Thanks

Interesting idea.

Chris Schwarz did a similar YouTube a few years ago.   I think it is most appropriate for areas that you cannot get into and trace.   In the above example, you could just stick a piece of paper or cardboard under the cut-out and trace (or cut) it out.   There's a similar technique for cutting tile to go against a wall.   Just lay the piece down on the adjacent piece and trace the profile out by putting an uncut piece on top of it.

Very interesting idea.  I have got to try this sometime, soon. Thanks, Gene.

 

20 hours ago, HandyDan said:

I saw this before.  His fit wasn't the greatest.  I think it could be with a little more effort and thinner lines.

I watched the video as well and HER fit was not great at all.  Shot at low angle after she laid it in to hide the fact. Principle is sound think execution was poor.

Edited November 21, 20196 yr by Pat Meeuwissen

You're right, Pat. There are a couple other YouTube videos where a better fit is demonstrated. Seems that the best use is in ship building, fitting odd shaped dry wall and, flooring. 

 I think a finish nail slightly protruding from the bottom would be more accurate instead of the point on the stick. It would leave the stick flat while tracing and act as an awl when transferring.