These are the plugs I installed in my fish boxes, I copied from Logic Dave, they work great, no more water comes in. Little tricky drilling the holes and make sure you use Rule Elastomeric Sealant. As for the mega hatch drain, we all have this problem, the only thing I've heard to do for this is to put in the little "pallot"(can't think of the name right now) that Triumph makes to go into floor of storage area, this keeps gear up off the wet floor.
Here is a web address for where I bought the plugs for fish boxes:
http://www.go2marine.com/frameset.js...egoryId/12808/
let me know if you have trouble with address and I'll help you find them.
good luck
fishahn