: Before tool is put to wood I need some info on how to make the "finger
: slot" for removing magnetic hatches. After looking at posts and
: builder's logs, I am still unclear. Thanks in advance.

Brian,
I used a small, 1/2" sanding sleave on my dremel. I carefully worked 'till I got a finger-nail shaped recess that tapers from zip at the deck, to a depth just touching the gasket retainer. Also serves as a drain for water in the seam of the lid/deck.
Hope this helps, Steve