My friend used the Bison Pitts, no stuffing in one tube either. He flew the plane faster than I would my DP Extra. His verticals weren't hurting for anything but I didn't see any hovering to judge that far. The 1.60 ran pretty rich by the exhaust trail. Made me happy I bought one anyway. He didn't weigh his plane but I lifted it and it was much lighter than my gasser DP model. I'll weigh my components and post tomorrow.