Hot glued a block of urethane foam to the lip of the landing light compartment, flush with the spar tip, and shaped to 3/4" high.
Layed up 2 x BID tape from this to the inside skin of the strake, to form a flange to mount the outside rib/door on the outside, and the light carrier on the inside.
Used leftover resin to fill a couple of bubbles in the strake skin, and weighted for cure. Sanded off one bubble and scarfed to surround. Covered with a 2 x UND patch with 1 x 4oz over all.