having a hard time adjusting door latches on my SPF 2116. spent many hours and my mechanic spent some too. thought i had it solved and then Fri. my son and i drove to Neptunes Net in Malibu for Pattie Melts and on way home drivers door kept opening at speed and a couple of scary times in a right hand turn, would appreciate any tips and any info on "Replacement" latches. all fasteners are tight. gets tiresome driving with one hand holding door closed.