Hi everyone,I'm wondering if anyone can advise me. I have a myson extra motorised valve in my airing cupboard for the oil central heating. When pulling the lever back to 'hot water only' the plastic bit of the lever broke off in my hand.The heating is now stuck on hot water only and can't be pushed back as theres nothing to hold it in place.I'm wondering is there any quick fixes for this as the rest of it works fine or will i have to buy a whole new motorised valve to replace it? I've searched online and i can't seem to find anything apart from replacing the whole thing. Any ideas?