Re: 300 Baud - much faster than Baudot RTTY
Baudot (Murray) RTTY at 45.45 baud with 7.5 bits/character is slower than 300 baud 10 bits/character, but not _that_ much slower. Yes, I did edit over 300 baud, when there was "bad weather" for 1200. Using DEC's EDIT (then later KED, think: VI, but with slightly less arcane commands). Staying in non-visual mode unless needed, and setting ROWS to something like 4 (rather than 24) when going visual.
At least nobody I ever met tried to use a "visual mode" editor on a Teletype. :-)