Here’s one I found in a quick look.
http://youtu.be/ZeAKD_yy7Uo
This guy is no caulker but it serves to show the basic principles. There are lots of others. A good caulker when tucking sounds like tap, tap, tap, tap in quite rapid succession.
I’d make you one myself but you really need a boat to work on and I don’t have one handy. (nor do I wish to …… I’m retired :-)…)

The early bird gets the worm but its the second mouse that gets the cheese.