1997 and 1998 cars have roller/ball bearing sheaves for easy trimming. The sheave carrier pivots 45-degrees side-to-side, swivels and articulates fore and aft to handle changing lead angles. Cars ride on low friction plastic slides.
The 1997 pinstop lever locks open to move car along the track. The 1998's car-mounted high-load sheave makes a 2:1 adjuster tackle when paired with the B1877 or 1844.