Oops-you are correct SAS. Actually the guy I sat next to immediately upon joining SA, Rip Green, had flown the 25, and did not have much good to say about it, but I do not remember what his complaints were. Unfortunately, Rip left not too long after I signed in. But the 25 didn’t last very long at all in Army livery now that I recall. So, while it didn’t impress, the 21 did, and there were still healthy casual bar discussions involving whether it, or the H-34 was a better machine in the mid 60’s.