Had an interesting one today and I think I've found a possible issue with uploading to Google Drive which means setting things up slightly differently, I'll try and find some time tonight to test it and document it.
In short, I noticed my backup hadn't worked overnight again, I tried running manually and got the following:
"Failed to create file system for "gdrive
OTeslaMate": couldn't find root directory ID: googleapi: Error 403: Rate Limit Exceeded, rateLimitExceeded"
Following some googling this morning, one possible explanation of this is that because we are using a shared/universal ID (we skip the step in the rclone setup to use a client ID) you sometimes get rate limited, depending on how much data is being uploaded on the shared/universal ID
I'll re-run through the setup of rclone later and document how to create the ID and see how it gets on, might go some way to explaining why these sometimes fail to upload.