Save changes perminantly to EX4?

Please read the following two posts and check the advice from RAC8006 about setting up a user-start script. On the MyCloud the user-start script will run when the unit boots up. As far as I understand it this is unaffected by firmware upgrades. Perhaps it will work on the EX device. I don’t know.
http://community.wd.com/t5/WD-My-Cloud/■■■■■-s-guide-to-making-WDMyCloud-work-needed/td-p/873083/page/2
http://community.wd.com/t5/WD-My-Cloud/stopping-services-the-easy-way/m-p/876326#M34761