The new 1,5ah Flight Power battery and two new C261 servos for the elevator and rudder. The servos are amazingly small AND you can fit standard servo horns. The old waypoint-like servos are really disgusting and will be used in the Bluebird project.
The battery has a different connector than the Graupner/Kokam cells do for the balancer so a crossover was made using a multiplex connector. It’s ridiculous that we can’t have a standard for balancer connectors since it’s a very important safety feature.