Hi, I am pretty new to Nitro, I bought a Novarossi Roma .25 for my Losi 8ight-T 4.0 and I got the carb turned so the ballend is in the right spot for the throttle linkage, but i need to adjust the Fuel Inlet Nipple. I know I need to loosen the HSN Housing, but I am not sure what the best tool is to do that, and since its brass I don't want to damage it. Is there a special hex driver that fits over it? Any help is greatly appreciated