triangle screw driver is available on ebay. It saves a lot oftime and agony. I used a screw dfriver that resembles an octagon, I forget the name of that type of screw driver.
My Trackmaster/Tomy/Plarail Photo Gallery Page (over 600+ photos and still under construction)
https://www.flickr.com/photos/183311600@N03/
https://www.flickr.com/photos/183311600@N03/