In this video Didier Boyet Sensei demonstrates katatedori gyaku hanmi iriminage jodan
If you have trouble viewing the embedded video you can view it on youTube via this link:
Here, Patti Lyons sensei demonstrates katatedori ai hanmi kotegaeshi chudan:
Link to view the video on YouTube: https://youtu.be/4lcO0JMV0BY
In this video Boyet sensei clearly shows the chudan opening motion. The attack is ryotedori however it applies just as well to katatedori gyaku hanmi.
Link to view on YouTube: https://youtu.be/5ygTcp6hy3o
Kate Savoca demonstrates katatedori gyaku hanmi kotegaeshi gedan. Note her opening motion. For testing at our dojo I'd like to see you do a tenkan as you apply the kotegaeshi.
Link to view on YouTube: https://youtu.be/BlAIS_tBu98