I also agree with Dave. They cvan be an excellent trainer. In fact I have one that has well over 1000 flights, yes that is one thousand, and a lot of those with it being used as a trainer.

They are as stable as a trainer and more so in some respects, lands just as slow and the bigger trainers, they are very forgiving to the inevitable opps that students run into and can take a good beating.

Now between the 40 and 60 size, I would go with the 60 size. Both are excellent but I think the 60 size would be better down the road.

Consider mine as an example. After solo I went right into the 40 size and had a blast. Thought I was bored with it so I sold it and it was promptly destroyed by someone else. That plane had well over 100 flights at the time. I went almost one year without one and one day I did a maiden on a 60 size. Later that day I bought one and I still have it even though I have moved in 50cc and larger gas powered planes.

I still love pulling out the 4* and just having a blast doing low KE passes, pointing it into the wind and stopping it in mid-air and just generally abusing the plane

You can't go wrong with any version of the 4*