Quentin Barnes has updated his GreaseWeasel software to Alpha 8. Please do not be concerned with the “Alpha” designation – he is being cautious. This software is FAR superior to the software which comes with the Greaseweasel for reading TRS-80 Model I/III/4 disks.
You can download the software at https://github.com/qbarnes/gw2dmk/releases/tag/v0.0.1.alpha.8