I have never worked on a Maida,but something you may want to look at on the Virginia Controller. They have a Relay on the back of the controller that has contacts to strengthen or weaken the Motor Field. Have had numerous problems with the contact becoming badly burned due to the high current in the circuit. This causes the Elevator to not slow down properly and blow through the floor. It looks like a Compounding problem, but all you have to do is clean the contact. You can put a meter on the Motor field and compare it to another car to see if there is a difference. Good Luck.