Hello. I began to fix the slots for spruce wood that will receive the aluminium struts. I will change them for 1/4 x 1/2 inch for add resistence. I have very care with level horizontal as vertical. Once that I have it, I'll make slots in fire wall and I'll glue it. I'll reforce the formers where they touch the longerous.
I am sending pictures about
this. I wait your comments.