I’m not a fan of the original Carrera thumb speed controllers. So if you are using the Carrera digital system I recommend using some sort of Pistol-grip controller. There are several products on the market. Most common is perhaps the Slot.it SCP controller.

Here is a list of the controller I have tried and I can recommend for the Carrera digital system:

• SCP (1, 2 and soon 3) from Slot.it.
• Frankenslots Speedflow comes in both wireless and wired option.
• Carrera-D IV from Truspeed.
• Ramjet-X from Digital Racing Solutions.