Type 44 rear strut installation - washer or no washer?

[Michael, Dave]

This is a BTDT question for those of you who have installed rear struts
on type44 quattros. 

I am installing new springs on my avant, and while at it, installing new
Monroe sensatracs (free replacement under lifetime warranty). The
install diagram with the struts, does NOT show that one is supposed to
use the washer between the bump stop and the adapter bracket that screws
to the car.  The show the bottom of the bump stop bearing against the
bottom of the expensive oddly shaped rubber thingy that goes on top of
the adapter bracket. Diagram below  (strut shaft not shown).

TIA

Dave
90 200QA 210k

           _______
         /              \
         |               |   <----rubber thingy that has the top nut for
the strut       
         \--------------/
------------          ----------------   <------- Bracket that screws to
the car
         ------    ------   <---- Do I use this washer? 
          _______
+++++/             \++++++ < diaphragm part of rubber spring seat
          |              |    
          |              |
          |              |   <----Bump stop foam
          |              |
          \  -----------/