I started flying with a SIG LT 40 using an O.S. 40LA engine. This is a great trainer because with a 40LA and a 10x6 prop this is a slow gentle airplane to fly and make your beginner mistakes on. Kind of like the 'Little Old Lady on the Expressway'. I flew my SIG for a few months before I went to a low wing Great Planes Sportster. I changed the engine to a 46AX for awhile and didn't notice a lot of difference from the 40LA until I changed the prop from a 11x6 to a 11x7 and it was like I was flying a different airplane. A lot faster and little bit wilder. I just put the 40 LA back on it. I still fly this plane all the time. It is fun, very predictable, and relaxing. My wife likes to fly it too.