Darcy great blocks. If I am concerned that I won't have enough fabric to do what I want I draw out all the pieces I will need on a graph paper that I have drawn the size of the f8 on (usually one box per inch or one per half inch). If I am fussy cutting I cut the shapes I need out of freezer paper and press them to the f8 so I can make sure I have enough repeats that are usable w/ seam allowances and all. It is a little more work but usually keeps me from having to ask for more fabric. And I almost always cut it close.
Oh no I hope Rio gets better soon and it isn't a return of the cancer.