Maybe I'm missing something. I have a 11/11 build X5 diesel with what I think is suppose to be the hi fi sound system...non Logic 7. That is to say, mids in the front and rear doors, tweeters in the Front door sails and center dash, mid in center dash and subs under the seats. Total is 10. When I look for the upgrade on the BSW site it offers tweeters for the rear doors as well. If they are there, where, because i don't see them. If not, is there a replacement speakers set offered for my configuration. Thanks in advance for the info.