Oh, yes! Wollte is Praeteritum!! The grammatic is the worst part of German (and all others languages!)
So, it's important don't repeat the subject if it is the same in the same period, but I must repeat the verb (as in "Ich moechte..."), also if it is the same!
Oh, for the last sentence: "im Detail" it's never used, or just in particular cases?
Thanks a lot!