Thanks for the teaser.
You probably need 70 mm extention for the 7-14 mm (47+22,7) so the best guess is that you tried it with the 36204 60 mm extension with the external locking function.
For the fisheye, the previous 4,33" minidome might be good with an additional 30 mm extension...
That's fine , but will the curve of the 4,33 minidome be good for the 8mm of Olympus , not leading to the issue of softcorner as we already undergo a little with the 8 mm Pana use with the 4,33 and 3,5 as well , ???