Device major function & usage:
Adjust the wheel track by adjusting along connect rods.
1. Spring steel product is stronger to work well with specially when framework links are upgrading and down with stress.
2. The wheel track is modified by tuning in the tie rods to test various playing mode.
3. Each tie pole may be modified to 1.2mm reduced than initial and 3mm a lot longer than original
Use with unique ball stops.