The LNB is supplied with a female fitting for connection to the dish arm which in my case is an older Sky installation and requires a male fitting. Fortunately, a conversion kit is supplied which is where the problem starts.
The fitting is obviously not designed for that model of LNB as the throat is smaller and has different locating points than the collar so it simply moves about which is not good. So after much up and down the ladder trying the fitting from the old LNB and so on, I wound a load of tape around the throat to fill the gap. Up the ladder, it fits a treat. Down the ladder, no signal: on anything! Up the ladder, fiddle, Down. Nope. Up......
With the help of a finder kit, I find the dish just needs tilting up slightly. Now got a cracking signal on both the FreesatHD and Sky!
So, if you do buy one of these, and you really should, considering the price is a quarter of others, then don't assume you won't need a sat finding kit. Oh, and a good pair of legs!