Hello Das Bald Guy: You look as if you are moving right along. The TD is looking very nice. I used to live in Ohio and I know about the amount of rain that might come down at any one given time, not to mention if you are going down the freeway how much of that water is thrown up onto your teardrop. It is good you are water-proofing it as well as you can. This will make it stay dry and last you a long time. Nice Tracker you picked up. It looks very clean.
For what it is worth, I do see one small thing you might need to address. Your rear spring mount is placed too far back and it has the shackles facing forward. The shackles need to be facing rear so the spring can cycle as you go down the road. The way they are now does not let the spring do it's job correctly. It might bind the spring and it will cause a very rough ride to the TD, like it has no springs at all. All you need to do is place new rear spring mounts right in front of the existing ones and I think this will solve the problem. The shackles need to be facing the rear about as much as they are facing the front now. This way the springs will work as designed and they will never bind up. This will make to ride much better than it might be now. I am only adding my two cents worth for your benefit. I was told that the rear upper mount bolt should be at least 1/2" to 1" ahead of the bolt going through the rear of the spring. You can go to a trailer sales place and ask if this is a problem. On my two single axle trailers they face the rear.
Keep going on your build. It is getting there...
