Get an EQ platform, as I mentioned above. It sits BELOW your dob (your dob sits on top of it) and it will give you tracking for up to an hour before needing a reset.
I used one for 18 months, and just sold it to rmcpb. I had my 10" dob on it. Petra (spacezebra) bought one for her 12" lightbridge.
Go to
www.roundtableplatforms.com and have a look. They're great, and just what you need to keep the convenience and quick setup of a dob, with the beauty of tracking so you can just sit and look.
Combined with an Argo Navis, it would make your 12" dob complete, so you can spend more time looking at stuff and less time trying to find it.