I have the whole kit including not just the orion flattener but also the skywatcher .85 flattener they all work very well together most of my wide images (not the most recent) were taken with the ed 72 they are on these forums
I will be putting them all up for sale soon if you might be interested
Here is one image with the ed 72 and the orion field flattener
https://www.iceinspace.com.au/forum/...d.php?t=198752
and here
https://www.iceinspace.com.au/forum/...e.php?a=291507
This one with the .85 reducer flattener
https://www.iceinspace.com.au/forum/...e.php?a=285666