Peter,
Not sure about your comment on the Pentax being inferior to the Hyperion!
When looking for zoom eyepiece for solar I bought and tried a Moonfish, Baader (x2), TV (x2) and found problems with them all....
I was lucky enough to find a Pentax SMC XW 8-24mm Zoom.
These things are BIG...nitrogen filled and work extremely well. Everyone who has looked through it has gone "Wow".
It definitely works for me and is the best I've tried.
https://www.astronomics.com/pentax-8...ece_p3772.aspx