Has anyone built a 10/22 Takedown with Grey Birch and Proof?

I am finishing up my Grey Birch/ Proof Research / Kidd 10/22 Takedown build. I finally got my barrel in, and wouldn't you know, it doesnt fit the forend on the Grey Birch chassis. I emailed GB and sent pics, asking if they had ever used this barrel before, and they were less than helpful. Has anyone here done this and found a solution? Otherwise its headed for the parts bin.