Thanks, I added the following to the top, and it's at least changing to a red LED now but I still get no output. I suspect the issue lies with the script itself, I'll play around with it for a while. In regards to the dropbox piece, that all works fine. If I copy/paste the powershell string from the payload and manually run it in a run window, it downloads, executes and exfils and expected. Thanks again for your help, I'll report back if anything changes.
LED R
ATTACKMODE HID