Enerjet by Aerotech, Astrobee D Build, Part 7, Launch Lug Rail

Here's where we are - 

The front angle has been block sanded. It is still a little long.

The top and bottom front (arrow points) are cut with a hobby knife. 

Looking at the bottom - 

Some of that curve will happen automatically from the curvature of the bottom plate. I found I had to sand a bit more to define the curve.

I used a piece of 220 grit wrapped around a spent 24mm engine casing. After the 220 grit I followed with 400 grit.

The bottom after sanding in the front curves.