Okay.

But the open-mode way is also an easy way.
Ahh, not really. Now I remember that there were some reported problems with aegis and accounts when flashing an open mode kernel to a running system.
So best way is to reflash (flash forth and back ) even I had no problems like that and just removed my .aegis folders and recreated my accounts.
Yes, it seems your decision is a good way to start.