affagfgg? Thought same but to journey 162 miles,it's no!. I had words with a neighbour who had same lowball problem. 'Its a bog standard 50mmb Tball not suited to Alko arrester ' local dealers said same so £34 slid out of my locked wallet for alko one and I can see the difference to test hopefull they are right. Checking today (Sat23june).