Land Rover Discovery 2 Headliner Sunroof Fix

My D2 sunroofs were leaking rain water all inside the headliner like a shower. Here's what I did to fix it! Short version: the plastic nipples on the corner drain boxes on the front sunroof broke off, so the drain tubes were free floating in the roof. I drilled out the plastic with a 3/8" bit, threaded in a brass 3/8 fuel line fitting, and voila! Permanent fix.