hey Tom or anyone else who may have an idea,im tryin to use 1 of the varitube 510 in the FDV squonk box,but how is the pos supossed to be attached since the threads are on the 510 screw?,the lil deal i used on the FDV v5 510 will no way fit(cuz of threads),was guessin maybe using the 2 lil nuts...