Fin Box glass broke- help the jersey slayer

Slightly pickier way:
It's a shame not to have your right and left fins at the same distance drop from the board on your turns. You could hypodermic some resin under the fin box after pulling the fin back up flush, maybe use a level to level it off with the other side - then fix up the glass delamination when you can. Use some tape while it's drying to make sure the fin doesn't drop back down again the 2 - 3 mm. For this, you need to drill a tiny hole for the WD-40 straw that goes on the hypodermic to fit into. Pretty easy job if the box is not stuck down so hard that you cannot pull it back up again. As an add-on (enhancement) to this method: If the foam is cheesy down in there the resin will fill it in but it will add weight. You could perhaps put some gorilla glue down under it somehow - it will expand and fill any voids down there and the board will still be light. Surform the overflow of dried gorilla glue when dry, then do the above resin job.

Your way:
Tape off the hole, and leave the box down 2 - 3 mm. Put some resin above the box and below the surface where the delamination is. The resin will stick well enough to the delamination and it will be flush - just a shame to have your fin not stick down the extra 2 - 3 mm on your turns. Go surfing!

Shop way:
I don't know what a shop guy would do. They have futures fin kits and could redo the whole box in a half hour's work. For this method, you need to borrow a buddy's board while your board is layed up in a shop.