That's right. The ToUcam has a screw in lens, so you just unscrew it, and screw in a 1.25" adapter that lets you fit it into the focuser.
I'm planning on writing a how-to guide for astrophotography with a dob, which will include afocal stuff and webcam stuff. There's potentially a start to it in the "Tips & Techniques" forum, you might get a few hints and tips from it as a starting guide.
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