One more scan, plus some cleanup.

- added ben-dispbase-back-500um
- bz: added "git add" of all the new files (untested)
- index.html: renamed back from index.htm. The sneaky work-around only worked
  halfway.

web/index.sh

@@ -31,7 +31,7 @@ be read by many programs, including
 <A href="http://code.google.com/p/heekscad/">HeeksCAD</A> and
 <A href="http://meshlab.sourceforge.net/">MeshLab</A>.<P>
 High resolution scans can produce a large amount of data.
-If a file is 1 MB of bigger, its size is indicated.
+If a file is 1 MB or bigger, its size is indicated.
 EOF
 
 # -----------------------------------------------------------------------------
@@ -90,10 +90,9 @@ images3
 texts3 "4 h" "12 h" "58 h"
 
 scan_set ben-dispbase-back "Display shell, base structure. Back side."
-images1
-in_progress
+images2
 planned
-texts3 "1 h" "4 h" "50 h"
+texts3 "1 h" "3.75 h" "50 h"
 
 # -----------------------------------------------------------------------------