Bob Reeves did a lot for the Gluedobbers controline club.
One of the first things he did was to make inflight videos in 2003. one was "Twistmaster Controls, and the other was Twistmaster Tank. The Twistmaster was a modified Twister that resembled a Ringmaster.
This is what Bob wrote about the Twistmaster Controls video.
"This is an inflight recording of a Controline airplane flying the AMA stunt pattern showing the control surface movements. This flight shows how much control surface movement is really needed while flying the pattern. Please understand that this video was created long before GoPro using a VHS video recorder with a RF link between the camera and the recorder. At that time we did not have a way to record audio.
Pretty sure these are the first videos ever recorded with the camera mounted on a control line model."
The camera and assorted electronics cost $400.00 in 2003.
To view two videos, go to YouTube and type in TwistMasterControls for the first video, and TwistmasterTank for the second video.
You might notice that the tail does not shake on the profile Twistmaster during manuvers.
It's commonly believed that profile models shake the empennage during flight.