@MASV
In my Design the the outer face of the Stringer matches the Profile, this is difficult to see even if you tap the ScreenShot to expand it.
As suggested:
This is doable but by no means quick and easy.
I would be inclined to follow the idea regarding Horizontal Cross Sections and apply it to the Vertical Cross Sections. The latter could be used to create the Stringer Section Profiles.
Worth trying because Loft works extremely well and may transition better than you imagine.
Re: Access Profile Support Timber:
The task of creating the Support Timber for the Access Profine could be achieved as follows;
First Duplicate the Design and work on the Copy.
In this the Base of the ‘Cylinder’ was used to create a Plane for a Sketch, the inner Circle is the Aperture Support outer dimension and the outer Circle set to provide cutting the Support Timber.
Selecting the Closed Sketch Ring shape drag the Double Arrow downward in one movement.
Hide the unneeded Bodies:
To reveal the new support:
