I've been testing this and have set up a few DSMs. I wanted to see if these will update properly via Control Panel, Update & Restore but I found something strange. Clicking on release notes in any of these builds do not go to the Synology release notes for the OS. Instead, they go to
http://example.com/null.xml?model=DS3615xs&update_version=25556
http://example.com/null.xml?model=DS3615xs&update_version=42218-2
Anyone else see this, and is this expected for RedPill?