I got the owb out without unmounting the engine was pretty easy, covered in yellow goop, gonna clean it up and put it back and see how it goes. For reference its a koyo 0608 (6x10x8) search for hk0608. Seems that Traxxas do an exact same owb search for traxxas 5121 cant see the hex anywhere yet tho. I'm going to change fuels as well was running 16% and i think its way too oily.