Just popped it to say that I received mine the other day and can't be happier.
Dead simple to install and calibrate, great piece of kit. Works as advertised.
The instructions are also quality, each step of the way is clear and with excellent photos
I would suggest you add a note that you need to have updated to firmware 23 in order to calibrate on the very first page of the installation instructions as well.
I was so keen on getting started I already had it installed when I got to the calibration instructions that said if you don't have firmware 23 installed you need to update before calibrating. And, that you need the original slew device in place to update. Yikes... I checked and was updated. Whew!