990 - good stuff! The V1 has been able to provide plenty of warning against the Poliscan
On the video above, the V1 only began to alert to the rear only when within 100m of the camera - it did alert to the front first. I'd say that there was a lot more scatter than normal as I've never seen it do that before. It's definitely a good thing that it's picking up rear scatter as it provides us with hope against rear facing setups.
The tripod does have adjustable legs. I've seen one set up at around 1.5m.