So what would that do? Produce a 5% constructed unit?
What I really wanted was to just use the spellbook like an expansion of the training menu in a normal barracks type building.
I never saw that set construction progress bj before, that might come in handy.
So thanks anyway.
Draz
P.S. I decided to use a different system in my map, it basically involves producing an invisible building unit next to the mother unit and then putting an ability on the mother unit to swap selection to the building, so it seems like there is an extra training menu.
EDIT: plus rep for providing some useful info