The tekno had two type of clutch to choose from, the first one works exactly the same like nitro, which you will need a seperate servo to operate brakes. The second type is call traktion clutch, which works exactly the opposite of a nitro clutch, its constantly engaging and will only slip like a slipper. You can ofcause run a direct pinion. The EB48 are design to run all three options without any modification.
Hope that help.