Back again! I'm the only one reading these at this point haha but some progress has been made.
I had a leak coming out of the right side of the engine, basically oil was just pouring out of the cover for the oil filter so I replaced the gaskets there inside and out and it's fixed now.
The bike is running great, so of course I had to do something silly and that's where we are now.
I was able to pick up a super cheap spare seat on eBay so I saved the original one just in case. I cut down the back of the replacement to make it a little flatter, welded some supports into the seat frame, and built the ugliest foam seat in the history of the earth to put on it.
From there, I softened it up with some light upholstery foam and batting, shaped everything, and after about 5 attempts at making my own cover I gave up and had a local shop make one for me.
The last picture is the seat as it sits now before pulling the cover over the little tabs under the seat, which I'll do shortly and reinstall it on the bike. I wanted something flat, but the most important thing for me is not modifying the frame of the bike at all so this seemed like a decent compromise.
I got a nice little tail light so I don't need a rear fender and I'll be tacking in a bracket to mount that and the license plate on when it's registered, and we'll have a rideable little scooter for my trips to the gym and back haha.
I still have a little seeping coming from the shift lever, which I think is because the c clip that holds the gasket against the case is just worn out so that'll get replaced soon and we'll be ready to rock.