Does anyone kno of a working of of editing ANSI screens/headers and n messing the up in the process?. I mean if te Mystic built-in editor screws them, what else can I use?.

I use Moebius to edit ANSI screens. It's great. Here is a link to
download it:

https://blocktronics.github.io/moebius/

... Youth is glorious, but it isn't a career

--- Mystic BBS v1.12 A48 (Windows/64)
* Origin: From the depths of Bunker 3 (21:1/130)