That quote from Andy was a long time ago. There was a batch of 303S's that weren't square, so he was providing the 303W with the camera while the 303S was being remedied. 303W was only $19 last summer, but I see they have increased the prices at B&H lately. Andy has them cheaper, but his shipping may push it higher. I've used both many times, with a few SD59's, an SD49 an SD6AE240. They both get the job done. The additional waterproof gasket the 303W has (I believe the "W" signifies waterproof) is a plus, as it seals against the junction box using a double gasket (one on 303W and one on the PFA120).
That leads to my next point. I'm not sure the PFA120 Junction Box will fit behind the corner mount? Maybe, as all installs are unique and custom. One area that won't be available are the knockouts on the J-Box, as they will be blocked by the wings of the corner mount. That may not be an issue for your install though. One good thing is the PFA151 corner mount comes with 4 concrete anchors that will allow you to secure it to your masonry quite easily. Drill a hole, (1/2" I believe), tap them in and bolt right through them. They expand and wedge in to the masonry.
The camera will monitor your driveway, but don't get it for auto-tracking alone. It can be quirky, and provide erratic results at times if not set up properly, and expectations are too high. I will say it works better with the subject approaching straight at the camera, than perpendicular. Even then, the results may not be what you expect from auto-tracking. You get this camera for its awesome lens and zoom, low light sensor, and all around value for a PTZ. It's by far the best value in a Dahua PTZ.
@Korgoth will confirm this.
I've installed half a dozen speed domes for myself, neighbors and customers. Here's a few pics of the corner mount installs.
SD
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