Installing the Jr. Dragster Practice Tree Micro Switch and Cable. Allows you to practice inside your junior dragster and get the most consistent practice possible. As drag racers, there are not many things we can do to practice, but hitting the practice tree is and it can pay huge dividends down the road. In Episode 8 of Sudden Rush Shop Rowan and Matt walk you through the process of installing the new Computech Jr. Practice Tree that includes the Porta-Tree Pocket Pal Practice Tree, a micro swi