I did get PC-07. Right now I'm only using the guns and the elbows for Scrapper and Long Haul. The only problem I see with the set so far is that Long Haul's lower arms are too loose at the elbow joint. I taped in a paper spacer between the elbow joint and the inside of his arm to add some friction to make them less floppy and more poseable.
I'm not sure I'll use the elbows for Mixmaster and Hook. The ones for Hook look pretty bad in alt mode. I don't have anything against the ones for Mixmaster, but I'm going to have to figure out a safe way to remove the current elbows/lower arms.
I do like the guns, they're pretty cool. My Constructicons are totally gunned-up between the combined form's pieces and these guns, especially Long Haul