I have 2 issued utility patents prepared by an attorney.  I have 2 new ones  to prepare, and thought I could give it a shot.   I have adobe iliustrator CS5.  Not The easiest one to work with, for me.  What  may be the best and easiest to draw patent drawings with?  For a provisonal, its my understanding they do not have to be formal with numbers.  Does that mean do not include numbers referenced to discriptions.  Would it be best to number them for a provisonal anyway if you want to be close to a non provisional down the road?