Karl, when you get the new 'brush, check it over.
The advert mentioned this, but check the setting of the needle, to ensure it's fully held by the clutch (that's the knurled knob at the rear of the needle, revealed by unscrewing the main body.)
Also, carefully remove the tip (which wasn't fully screwed home on mine), and check that the actual nozzle/jet is fully tightened.
It should be fitted with the correct nozzle and needle for that set-up, and of course you can change nozzle and needle if you need to, for a different spray pattern, with those provided in the kit.
Other than that, it seems to be fine, and the same as the one I gave you, apart from the side cup.