Whoops. Missed this. We could have saved you those hours. 
You also have weekly signed ISO. But after the updates they should be pretty much the same. Just FYI: QubesOS 4.1 Signed Weekly Builds
Plus, a beta is now available:
Whoops. Missed this. We could have saved you those hours. You also have weekly signed ISO. But after the updates they should be pretty much the same. Just FYI: QubesOS 4.1 Signed Weekly Builds
Plus, a beta is now available: