Aresti: You can get spares through your Hirobo dealer, wings are available.

The control surfaces on the Hi-perf are HUGE. I have no idea how they compare to the FAI. I mentioned an 52 as I have heard it flys a good schedule on this motor. A YS 53 might be better... for 3D I used a YS63, it was out of sight. I used the APC Paddle Blades 14x4 (ultra wide). Flies like a dream, steady and very agile. No problems if you need any info on the Stream 50, just ley me know.