So this morning I was up ages before my alarm clock went off and hadn't even had a brew or breakfast yet, I was sitting outside in the sunlight when a van pulled up, and the chap who I was told would come at 9 o'clock to fix my wheelchair came. He replaced the handle bit and said "What screw?" watched as I opened it, said "Ahh" and got stuck in. Initially he thought he was gonna have to come back with one next week but in the end replaced the threadless screw. Secondly he thought he was gonna have to go out to his van and saw a bit off the end but on further looking he found a shorter screw with same sized teeth