Our new Fiats have the triangular swing arm for the guide. It would be a big help if a swing arm rally expert posted a demo for setting up the arm travel for our track. The car came without an arm locking screw and axle grub screws, but NSR sells a parts kit with 4 different length screws, 4 axle grub screws and 2 springs. I ordered the kit and should have it this week.