I have run into problem I am struggling with. I need to create a 5' to 6" Disc which conforms to the locomotive smokebox. The holes for the attaching rivets would be radial to the smokebox. I do not know sheet metal, but in my head if I did I would approach it thus: Create a Sheet Metal Disc 6" in diameter and 0.75" thick with the rivet holes and then bend it so the inside surface conforms to a 26.5" radius. Then convert to Part to complete Smokebox Brace. If one starts with a circular Rod 6" in diameter and cuts the back and front the edges do not conform vertically to the Smokebox.on the top and bottom. Be aware I did not proceed with the latest update in December 2018 as this is a hobby which Alibre's original low cost version prompted me to purchase, so I cannot directly import a part produced in the most recent December 2018 edition. A pdf of the location and profile of the brace is attached.