I did it a little differently. I set up my custom VH preset, complete with the mic settings I want. I named it Don1.
I set the registration parameters to not ever change my setting.
Every time I turn the kb on, the first thing I did was call up my Don1 VH setting. After that it stays the same until I change it or turn off the keyboard.
I found it quicker than having to load a startup registration and then go to Parameter Lock and change the setting there.