Hi, I just baught my first cen product. it is the gst 7.7. I love it but i am having tough time with the braking system. Is there a way i can adjust the braketension on the truck directly or do i have to use the radio? if i had to use the radio can anyone give step by step instructions? all the answers are appreciated. thanks you guys. I am still new to the nitro worls and ireally want to get into the hobby!!!