Lots of rain the last few days - the plastic guard I made for the filter was lacking for filter protection, and the rear wheel was kicking up lots of water onto the top of the seat - so I made a new rear fender out of the stock front fender. It doesn't look sweet (no kidding, eh?), but I hope that this fixes both issues. Also, this one will keep junk off the rear shock, as an added bonus.
EDIT: Added photo - also bought dash fasteners to plug the holes. I bought the biggest I could find, but they were still too small. I'm trying not to resort to duct tape... maybe electrical tape will do.
I took and added pics of the frame welds and added them to earlier parts of this thread.