Have you checked your CG lately? A nose heavy condition can cause higher speeds when landing. Of course you should notice it on takeoff as well. Inewqban's advice on taking it up high and getting intimately familiar with its stall characteristics is excellent. That's one of the first things on my checklist whenI do the maiden flight on a plane. You gotta know how slow you can go and - on the other side of that coin - you gotta know how slow you should NOT go