The smoothing work on the canopy curves is complete for the F4F-3. Adapting to the -4 will follow in short order.
And I think I will smooth the Mk 8 sight's upper reflector edges (mounted in the -4.)
I also added a couple of hier.him entries for the mirror and its base. In addition to the default tilt of 10 degrees, I defined tilts of 12.5 and 15 degrees. The farther you lean forward, the more tilted the mirror must be if you are not to be seeing just sky toward your high six. And so if you fly and fight near the sight (hey, that rhymes), you can choose a more strongly tilted angle so that you still see directly behind you (instead of looking at a more upward angle.)
All you need do is open hier.him with any text editor and remove the preceding "//" characters for the line entry you want to activate, and make sure all other lines have that preceding "//" in order to disable them. At the end of each line I have a brief comment indicating the relevant angle for both [BASEMIRROR] and [MIRROR], so it's straightforward to make the selection.
Needless to say, a backup of hier.him might be wise. Or you could make three versions of this file, each with a different mirror angle selected. With these files each residing in its own subfolder, you can then simply drag and drop, with no fear of mucking things up.
If you inadvertently set different angles for these items, you will have part of the view clipped to invisibility because of the two surfaces intersecting. The mirror must be located a short distance nearer to you than its backing base, with no contact between the two objects.