I should be getting an email tomorrow which will let me know the exact shipment date. I will then personally email all those with one on reserve.
The SL-X will be man enough for almost anything you want to throw at it. It will easily push any window shut. I carried out a very 'scientific' test on it last week, unfortunately I did not have it on video! The test was called the throwing it off the back of a moving vehicle at 35mph and watch it bounce along the road!!
I had forgotten to strap it back on the roof and it decided to part company with the vehicle as I accelerated out of the 30 limit. It picked up a gash on each clamp and a massive dent in the gooseneck, it also pulled the end cap off. I popped the end cap back on and used it on the next job with no adverse effects. It survived very well, we have also done the classic letting it fall over tests when fully extended etc. All intentionally of course