Marian....I have one of these and it is really a fine aircraft.Mine has now done over 60 flights and 12hrs flying. In the build I did change a few things..I put two small servos in the ailerons ,one each and a very small amount of differentail..Power is a OS40LA swinging a 10x6 prop...when hot a good low idle.also you might want to seriously look at your wing mounting. First off I dont use rubber bands ,it means that the wing can still move a very small bit,and each time you put the wings on you dont always get them it the exact spot each time.Secondly the cabane struts are very loss and the top wing can move around.I have made up fiberglass clamps and bolted the top wing on.Thirdly,USE the interplane struts they are there for a reason. I have made mine to bolt on ,after flying it with them only slotted as per plan.and it made heaps of difference the whole wing area is so muuh more solid.and the plane flew much better. Any time I go flying this is the first plane I take and often the only one I fly.It will land quite slow and fully in control right to the ground.When I decided to built this plane I had a look at this Rc site and there was so much negative about this plane I was a bit affraid to test fly it In the end just got on with the job and I really dont know what some of the guys did but it was really an anticlimax for the test flight. DONT change the rigging from the plan,as it is correct,just make sure you have it right. cheers Mintie