QRS Pedal Solenoid Issues

[Andrew and Rebeca Anderson]

I have this Hallet & Davis mini-grand on the floor with a QRS system 
factory installed.  Saved a lot of time but dialing it in is very 
much necessary.  Pedal lock screws on "pitman" loose and it dialed 
itself way down... etc.

It was played all day and it started having pedaling 
deficiencies.  Tried putting a hand on it, ouch--hot.  It felt like 
it was grinding to get down to the bottom of its travel.

I noted that the pedal bar was at about a 5 to 7 degrees off axis to 
perpendicular to the solenoid.  The solenoid was operating about one 
inch back from the end of the bar.  I cut a six inch piece of wood 
7/8" to wider at a 5 degree angle painted it and mounted the solenoid 
to it.  I then turned up the power to the solenoid and now it is 
playing the Schumann Symphonic Etudes quite well from the 2002 Piano 
E Competition.

Question, does anyone specialize in these QRS systems?  Is that 
grinding feel normal when very hot?  Obviously the factory install 
was perfunctory and nothing was idealized (angle, point of incidence 
to one side of the bar, loose set nuts etc.).  Any other heads up on this?

Andrew Anderson