I am trying to create two sills which meet at a corner. The attached model is the result I have managed to get so far and is essentially what I am looking for, but the flat pattern is not accurate around the mitred area.
I have considered creating the profile as a weldment and using weldments before converting the bodies to sheet metal, however, you will see that the profile shortens over the length of the sill. So weldments would not be suitable as far as I can tell.
I would like some advice on how to achieve the same result shown in the attached model, but which is accurate enough for fabrication.