I just made Thunderstruck Pumpkin Ale a couple weeks ago. If you're going all grain I recommend that you add the pumpkin in the mash. I added 75oz of pure pumpkin and a pound of rice hulls right to the mash. Slightly longer sparge time, but overall worked great. I had no problems pumping the wort through my CFC. Tastes great, can't wait for it to be finished.