I just added L.G. leg and intersection fairings to try to seal the L.G. openings. I still have a significant air leak behind the seats. Have not had a problem with cold fuselage sides against our thighs.
To tell the truth, we looked at that air leak as an advantage down here in Florida but we were up in D.C. last weekend: 27 deg (F) on the surface, 6 deg at altitude and we pretty much froze our tushes off
- cold air coming in from the baggage area and unable to get the engine temps high enough to keep us warm. I've fabricated a simple fixture to block a portion of the radiator if we go north again in winter. Not exactly sure how much to block off but it's adjustable and I'll have to experiment with it carefully.
Sure would like to know where the air is coming in, tho.