I definitley had the same problem accessing the LSN, Im not sure how reversing the exhaust ends didnt make a difference for you TERMINATOR, unless some of these trucks have subtle design differences...I got mine back in November and it is my first RC...and even before I ever put fuel in it I saw this problem and corrected it by switching the exhaust, so Im with you MINDTRIX in saying I dont know how they miss that at the factory; and contrary to the post from CEN Racing above, I have read a lot about people having trouble accessing it. All that being said, I am extremely happy with my MG-16!!!!