You’re writing in the video that it’s the 125hp version. But the GC-1A had the smaller C85 engine with 85hp. That’s basically the reason I don’t want to buy it.
Does the POH say anything about that? In your video the manual mentions the fact that the Swift was availble with 85hp and 125hp but not whether the bigger engine is modelled. From the performance in the video I wouldn’t think you could do this kind of flying with only 85hp …