Hi there, and welcome along!
Just a quick point about the LSM, if you change it, you'll get an error on the mileage display, some info HERE, there's plenty of help around to get one "virginised"
It's a good idea to get things sorted with a faulty LSM, they have been known to end up like this: https://www.flickr.com/photos/10615841@N07/10157740506/
Good luck!!
EDIT: Beaten to it! :-)