Floppy Fallboard dilemma

[Kenneth Jankura]

Help!
I tune a  Yamaha GB1 grand in a church.
I received a call a while back that the pianist is unhappy that the  
fallboard is so loose it falls on her hands.
I stopped by to check it out, and this mechanism is a little  
different from the G series grands.
It is spring metal that is circular and follows a leather covered  
circular mortice in the side of the fallboard.
I tightened the spring tension by wedging the spring with a piece of  
hammer felt under the bottom of the two screws, effectively making it  
push against the leather harder. I could feel that it held better in  
the up position.
No go. Another call, fallboard still keeps falling on the pianist's  
hands.
I went back and carved some hammer felt and glued it to the inside of  
the case, in just the right spot so when the fallboard is  raised, it  
puts a lot of pressure when it is in the up position. I felt I had to  
use quite a bit of force to place the fallboard in the up position.  
Permanently fixed.
Of course, I just got the call that the pianist has once again  
removed the fallboard because it keeps falling on her hands. What is  
going on? The music director and I joked we might need a gate-type  
latch to satisfy this situation.
What should I do? What has worked for you in the past? How do you  
redesign a floppy fallboard???

P.S. I suggested a well placed tuning mute...

Ken Jankura RPT
Newville, PA