Devins new saddle arrived and it has very little room for the battery between the rails. This is about as good as it is going to get due to the logo badge and lengthwise stiffeners on the saddle base. Final placement will be determined after the bike is assembled with the correct set back.
Here is the seat tube lug at about 90%. Next time, it will be easier to fab a custom lug. It's time to finalize the color scheme. The frame weighs 4lbs. 2 oz.