Lego compatible octagonal roofs

Lego compatible roofs modular elements to build octagonal roofs in combination with the straight roof elements.
i1, i2, i3 and i6 is the slope angle
8,12 and 18 is the octagon diameter, not counting the eaves. You can not mix different octagon sizes in the same ring.

Please visit our gallery to find the other parts of the roofs and the octagonal Lego compatible walls
https://www.thingiverse.com/jm00092/designs

Please visit our weblog to find more examples, images and building techniques
https://construclonica.wordpress.com/2021/08/04/tejados-octogonales-compatibles-2/