Went ahead and bought all new headlights this weekend and got them installed. One low beam headlight had a lot of moisture inside the housing and another had a fair bit of overspray on it so I just replaced them all - doing that made a nice difference in light output. Found a couple broken adjusters and that of course helped to be able to properly adjust the headlights.
Whoever installed the exhaust ought to explain why putting the passenger pipe directly under the oil filter is a good idea. Yep, had to drop the pipe to be able to change the oil filter.
Couldn't believe how clean and perfect the undercarriage of the TA is - absolutely no rust on the floors or anywhere visible from the bottom. That made up for the oil filter issue for sure!
I'm finding that the fuse for the headlights won't hold with the correct 20 amp fuse. It will hold with a 25 amp fuse so I need to start finding the problem. I think I will start with a new headlight switch as the dimmer for the dash lights isn't working anyway. Maybe I'll get lucky and find that the short has something to do with the switch.