On the radios, read what Piper Chuck wrote. On the engine, the Evo engines are a mixed bag. Some run like they are supposed to out of the box and some run like crap. I bought a 60 size Evo and pulled it off the plane after 5 flights. It never did run right and I haven't had the time to goof around with some more, maybe later. I love OS engines! I recently bought a 46AX to see if it was as good as my 46FX. From the way it runs and the power it puts out, its even better! Same power or a bit more with a bit smoother idle. Ran great out of the box. For the price difference I would go for the AX over the Evo any day! On the plane, the LT40 is an outstanding trainer. If you go the kit route you can't go wrong. The parts are numbered and/or labeled and precut out to notch into each other. The instructions are numbered so that you just check off the boxes as you go along. There are lots of pictures so that you are sure which part you should be working with. The downside is that the plane is quite large and it does take some building time. Also by the time you add in the cost of covering and extra glue the ARF is actually cheaper. If you want to start flying this summer you won't have time to complete the kit before the weather turns to crap. You would have to get an ARF. If you do get the ARf, at least make sure that you second plane is from a kit. You miss out on a lot of basic knowledge by not building a kit. I see it all the time when a new flyer "bumps" his ARF trainer in too hard and breaks a piece off. Then the guy is going around asking other pilots to help him glue the piece back on! Hope this helps.[8D]