First time adding weights to my non mag car

This is my first time adding any weight to my one car without magnets. I'm not sure where to add the weight but let' see how it performs. let me know where you add your weights

Some other slot car channels I enjoy watching are below
Marty Ford -    • A shipment of new products from Oscar...  
Conquest Racing Club -    • SLOT CAR UNBOXING AND LAPPING SCALEAU...  
Slot Car News -    • Carrera and NSR news  
Area 51 Raceway NC -   • SCC Wiring Kit Instructional video fo...  
MP Slot Car -    • Final Run On The Current Layout! Carr...  
SlotR -    • Mundon Park Episode 3 - Improving Tra...  
Shotgun Dave Slot Car Customs -    • Channel Milestone and answering some ...