I struggled with the Jun loaders as I could not find the extra driver files as all of the forum links were expired.
Then I tried the Automated Red pill loader and on the second try I was up and running. 918+ DSM7, running smoothly on my F2-221. I am using the ethernet port closest to the power plug, not sure if it matters, but on the first try I was using the other one and the system stalled while loading DSM.
The process seemed intimidating at first, but it is really slick and simple. I found this YT video helpful: