Back from the ATOC and ready to get serious on Robins frame. Here, you can see that I removed that little bridge between the chain stay lug ports. I also reshaped the rear seat tube point to match the front and carved out a little window.
I also reshaped the outer points on the chain stay ports for aesthetic purposes.
These bottom bracket shells don't have the down tube ports machined to the bottom, leaving a ledge. I like the down tube to extend fully to the bottom of the shell, so I removed the ledge. This shell started out at 180 gms. and is now down to 155 gms. After the down tube point is reshaped and a larger window cut, over an ounce will have been removed.