I have had the Magic Extra 300L with an OS 50SX and I'm currently flying the Magic Formula 3D with a Super Tigre G90. Both planes were nice kits except the covering on the Magic Extra was not very good. The covering on the new Magic Formula 3D however is Monokote. The Magic Formula 3D is a really nice kit with some thick lumber and solid. I wouldn't hesitate to buy another Model Tech product.