After a quick discussion with @Lindalher yesterday, I accepted to take over this fort and intend to begin today assuming that @Darkkiryll has already accepted to let someone else build Fort9 since he is busy with the Shire at the moment.
I might do small adjustments to the planning of the fort but nothing too drastic that would require a true update to the original post of the thread (mainly some corrections of scale and thickness of some walls).
I estimate the that fort could be finished in approximately two weeks from now if everything goes well.