Looking nice, as I too always leave room around each of the islands.
What has me scratching my head though is what is the “.01 islands trick” you refer to, and what version of Blender did you use? This may be something which was introduced in the latest version, which I may not have … yet. 
might be margin between island I guess , nice works!
I used to squish as much as I could in one UV map. Grant suggested 3 maps at .01 margins. Blew my mind. I think, just watching someone else do a process it unblocks whatever attachment I had to my own.