These are some raw notes which I'll turn into a more comprehesive article soon.
730TE Restoring
I stripped the machine down, including the display and recapped it.
Niggles and Issues
I had a lot of troubles with both IBM Microdrives or Industrial CF cards as a replacement for the 260Mb HDD. The problem was nuanced - it wasn't that the drive was not readible or usable, it was that in FDISK, you couldn't wipe any existing partition because it had a label that could not be typed! It just showed as 'B' under the label but it wasn't B, with or without spaces. The same thing happened when I tried doing this on a 755c (which eliminated the IBM Microdrive adaptor as being the issue). Eventually, I found some CF cards (namely Trascend CF300) didn't have this problem and ended up using this.
I frequently encountered issues with the external floppy drive on the 730TE and, weirdly it wasn't the drive or the floppy disks themselves. I was swapping between two known good drives and different FDD sets but sometimes the 730TE would just refuse to read files off the disks and I had to give up.
I eventually largely did the entire paritioning of the CF card, the install of DOS 6.22, Windows 3.11 and Pen Computing 1.0 on a 755c and then transferred the CF card over to the 730TE which worked fine.
Software
I could have gone with a few different things but decided to go with Windows 3.11 - which had it's own challenges. After I got 3.11 installed, and downloaded the Pen Computing 1.0 3 disk set (for IBM) I discovered that this IBM set was for the 360PE and 750P rather than the 730TE and had the wrong drivers. Luckily someone else had this exact same problem and had recovered the 730TE drivers from another 730TE owner and provided the files.
I've put everything in this ZIP file, or here on archive.org:
1) DOS 6.22 Images
2) Windows 3.11 Images
3) Pen Computing 1.0 (for the wrong IBM!)
4) Drivers for the 730TE and instructions on how to copy and use them.
I've also made an image of my 4Gb Transcend CF300 drive and dumped it here. I used this tool to take the image and re-write the image to a CF card.