I have built and currently fly 3 different classic planes; Super Kaos, Phoenix 7 and EU1a. There is a thread here on the EU1a. I'm about to start on a Curare, an MK kit. The biggest challenge is finding room for the battery, and having enough battery to complete a full sequence, assuming you are looking to compete. The Kaos and Phoenix are on 5s 5000 mAh and the EU1 is 8s.

happy to answer any questions,

Dale