In other treads I have seen mention of changing filament in mid print. As I looked into that, seems a Control Panel might be a reasonable way to go. However, in looking into adding a Control Panel, all sorts of pitfalls were mentioned, and, the posts seemed quite dated. So, any new versions, fixes, etc for a good reasonable cost CP that does not require "a lot of custom work"? Then again, looking at Matter Control, there is a means of creating a Macro, so may that is a saner way to go, given how infrequently I would likely be doing filament changes mid print.