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.
As you can almost see, the seat tube/down tube angle of the bottom bracket shell is 60' and Robins frame needs 55.6'.
So, I have some pieces of water pipe sleeved with scrap frame tubing and I muscle the BB to close up the angle. I'll get 2-3 degrees with this and rest by selectively removing material from the insides of the lug ports.
All the materials for Robins frame are now here. S3, HOXPLAT, Columbus, Paragon, etc. All the good stuff.
I tried a number of seat post clamps, and they all looked so out of place. The clamp interrupted the nice flow of the frame. So, I bonded the seat post to the seat tube and it looks great. I realize that this is heretical in so many ways, but I just had to do it. Now, do I paint the post to match the seat tube? Dunno yet..............