I have been slowly working on my gingerbread house. And sorting through my stash. I have done the buttonhole edge (my royal icing) around 3 of the 5 pieces of the house with white perle 8. I have added the single feather stitch (TAST Week 3). It is shown below in perle 8 DMC 902.
I still need to get TAST week 4 (Cretan stitch) on the house. Week 5 is the herringbone, which I have already used in the roof ridge. So really I am only one week behind schedule. Once I get the rest of the buttonhole edging done, I should be able to keep up.