My 140 came with a small hose clamp to put around the cap at the base of the plug to hold the cap firmly in place. It needed that clamp.
Thanks for the suggestion, hopefully will get the operertunity for trying this out today.
Also thanks for clearing up about the resistors, i had a look at the DA cap again, and sure enough there is one in there, dont know what has happened to the original cap at the moment[>:]