Chuck,
I understand your fix for getting the trolley over the gondola; however Dom noted that he also had a problem with the trolley not traveling back far enough for the pickup. We found that you can apply firm but gentle pressure on the vertical shaft assembly so as to shift it towards the gantry. This provides extra travel in both directions. When the travel is adjusted sufficiently the house and roof can be secured in the new position.
Dom, Some smoothness can be attained by cleaning the bar on the gantry to allow free movement of the trolley. I agree that new string and a clean grove in the gear work wonders.
I look forward to hearing other methods for this balky accessory.
