having an issue with my safari for about 3 years now I guess I should of addressed it earlier but I was to busy finding good stuff. the locking mechanism that holds the housing onto the shaft isn't holding any more I wedge coins under the lock but im at about 4 coins now and maybe a couple of pull tabs and it still eventually slips off very annoying .after about 5 soft swings the shaft goes flying any suggestions that don't envolve mailing my detector in for service