I call bullshit on docrace customer service. I cant get any replies via email, Instagram or even a phone call.
Fwiw i have been through 8 o2 sensors on the doc kit. Probably going on 9 when it gets reinstalled.
Doc Race has been pretty good at responding to me, but not always. I would say they are good but not great. I’ve ordered 3 kits from them so I have more experience than the average person probably.