This one sounds a little scary but I've done it many times in the past... just put a bead of elmers glue around the base of the plug and the unit,after of the plug is fully ingauged not down in the hole ( it goes without saying but I will anyways just incase...It only works when setting your stuff up ahead of time). I know not many of you will try this but im telling you works fantastic and it peels right off without a mark.
Brad