Chris wrote:
I saw at the Miami boat show a salesman demonstrating an adaptor that
when attached to the drill you could adjust the angle of the drive more
than just a 90 degree fitting. (Should have bought it) I need to drill
into the coaming through heavy glass and tap into a metal backing plate
and the bottom holes clearance is less that 11/2" above the deck. Any
suggestions out there??

Don't even think about tapping that backing plate.

Thru drill it if you ever expect to get it apart again.

Lew