Update...
Using the udp file, my GoTek now displays the hxc logo on the led on start up (with usb stick in or not).
I removed the udp file from the usb drive, placed the indexed config file on the drive, and a 40-track single-sided .hfe disk named DSK0002.hfe
When this drive is in the gotek, the drive's light slowly blinks.
The GoTek continues to read hxc.
Pressing the two drive select buttons seemingly does nothing.
TI Disk Em2 locks up on the title screen.
From TI EB, if I try to save to DSK1 or DSK3 I get an I/O error 66.
If I try to save to DSK2 however, the small round LED above the disk selector buttons goes solid green, and the pen drive led goes solid.
After a 1s or so pause, I get the same I/O 66 error.
I *think* 66 = error saving, device not connected.
Still wondering if my issue is cable-related.
If I don't want to use somebody's .hfe file, could I not create an empty .hfe disk that I could simply save/load programs to/from from TI EB?
And if anyone still reading, does anyone have a known working floppy cable they'd part with ??