Dear friends, thank you for the interest shown in my work.
Claude with your ability level doesn't believe that you have any problem in making a roof it tiles to tile. However if you want to prove my method you can also make it with plastic of 0.25 I have worked with plastic of that thick one using the scribber.
Bradley, for my is also a little strange the disposition of the stairways in this house,
to build it I have used this plan

that this kept in the library of the congress and that it can be consulted in internet. this file contains around 50.000 images of the different buildings that are architectural patrimony of it USA them I have not been able to get any plane or outline of like they are the stairways, so basing me on this picture


and in the plan I have supposed that it should be this way, I wait that some day I can know that fact exactly and to correct the piece.
I have to thank from here to people of Militaryhistoryonline.com for the valuable help that they have lent me
cheers