diff --git a/roles/calibre/tasks/debs.yml b/roles/calibre/tasks/debs.yml
index 43566b8fb..797b2bb57 100644
--- a/roles/calibre/tasks/debs.yml
+++ b/roles/calibre/tasks/debs.yml
@@ -28,8 +28,8 @@
 #  when: is_rpi and internet_available
 
 - name: Upgrade to latest Calibre using .deb's from testing (rpi)
-  command: scripts/calibre-install-latest-rpi-plus.sh    # HOPE IT WORKS FOR Calibre 3.27.1+ starting 2018-07-22 -- PLEASE TEST IF BOOTABLE IN Zero W?
-  #command: scripts/calibre-install-latest-rpi.sh    # WORKED FOR Calibre 3.26.x (Calibre 3.24.x & 3.25 required above prereq calibre-install-packages.sh then Debian's own calibre-install-latest.sh to be bootable in Zero W)
+  #command: scripts/calibre-install-latest-rpi-plus.sh    # NEC FOR Calibre 3.27.1 on 2018-07-22 (#948 -> PR #950) THO NOT BOOTABLE IN Zero W (#952).  Similar to Calibre 3.24.x & 3.25 in June 2018, which had used calibre-install-packages.sh then Debian's own calibre-install-latest.sh
+  command: scripts/calibre-install-latest-rpi.sh    # WORKS for Calibre 3.28 on 2018-07-26 (PR #971).  Likewise for Calibre 3.26.x
   when: is_rpi and internet_available
 
 - name: Upgrade to Calibre testing .deb's - target Ubuntu 16.04 (not rpi and not ubuntu_18)