A "loose" car that rolls freely will always handle more predictably than one fighting internal resistance.
Using thinner braid material allows the guide to sit deeper in the slot, lowering the front center of gravity. HOW TO IMPROVE THE HANDLING OF A SLOTCAR CHASSI...
Placing weight on the outer edges (pans) can dampen vibrations and help the car feel more stable through long sweepers. A "loose" car that rolls freely will always
The guide flag is the car's pivot point; its depth and height determine whether the car stays in the slot or "deslots" during aggressive turns. HOW TO IMPROVE THE HANDLING OF A SLOTCAR CHASSI...
Use washers to adjust the guide so it sits as deep as possible without the chassis dragging on the track. A guide that is too high can cause intermittent power loss or deslotting if the track braid is recessed.