If anybody needs the MM tube dimensions let me know.
The motor plate and welding cups are off the shelf.
See the bottom of the first page on the web site.

Paul Lamar

Paul,

Do you have 3D models for the 13B you would like to share with me?  The more
models you have the better.  I am using SolidWorks to design a custom
aircraft around the 13B.  I have not decided if I need turbo or not.  I
really only need 200 HP.  Thank you!

Best regards,
Glen DeBusschere

I use Rhino.

Paul Lamar