I'll be!! I had no idea the Provider was a Glider. lol I've looked at other gliders before and thought, "why not slap some engines on that one... it would be natural... " so I guess it stands to reason actual engineers did the same thing. I just never made the connection, that's a new one on me.
The c-123 in 1/72 happens to be THE last aircraft I need to find to make a complete collection for my USAF Thunderbirds "project." I wish they weren't so expensive.