@tyns,
This is incorrect your injecting your old Hardware (platform) Id as your new SmUUID (Systemid), so under Clover the OSX Hardware (platformId) will now be different, causing a S/N / Device UUID miss-match. You should be using the UUID value form the registry location detailed in Part-2 of the guide.
With what you've written above when you run iMessage Debug under your clover install you will see that your platform UUID has changed (again)
Do not get confused between the BIOS level UUID known as SmUUID or SystemId and the OSX generated Hardware UUID also known as the Platform UUID, if you do you will not be able to authenticate the iMessage security token that you originally registered iMessage with leading to login/contact list ... issues.
i suspect that many users are making this mistake, Part two of the guide explains the difference and how one is generated from the other ....
Cheers
Jay