Back in the 2007 time frame, Andrew Lynch had written
a utility to read
Vector Graphic hard-sectored diskettes on a Catweasel board. Called
"CWVG", does anyone have a copy of the program?
The program doesn't appear to have made it onto vector-archive.org
I'll add to Jay's comment about 100 tpi floppies: there was a Tandon
model (100-4M?) that did 100 tpi also. Of both the M and T models are