Mike, the Avi is a wonderful bird, and will fly well on the .40LA, but as has been noted it could be underpowered as your skills grow. From the context, I think you are looking at one of the combo packages from Tower, right? If I might suggest you try putting a custom package together - a Futaba 6XA radio, and a ball bearing .46-.48 sized engine. You'll find the Avi will land at trainer speeds, and is an excellent windy day flyer. I recommend them as a primary trainer instead of the heavy-dihedral birds as it is stable but has a much wider flight envelope. I flew mine, and still do, but found the OS .40FP (yup...I've had one since the FP days!) to not have enough kick once I learned the basics. Re-engined with a MDS .48 and once I got that engine broken in (which was a pain, I must admit), the performance was fabulous!