Glad to hear Ben.
From the reading I've done on the process it doesn't surprise me that it took quite a while to rise. One site claims about 15 hours for a recipe for San Francisco Sourdough to rise the first time.
I have another starter working, sans adding packaged yeast. I'm using filtered water and heating it. I'm also not using anyghing metal, not measuring cups, whisks, anything. Nothing but plastic, wood and glass. It's being kept in a glass apothecary jar. The first mix at a one to one ratio doubled within a couple of hours.The next morning it had a good amount of hooch on the top.Yesterday was also a good day with it working well. Today it had a foam working on the top and lots of bubbles. It will be interesting to see tomorrow since the mixture does not yet smell sour.

Bill