Hi, I have just bought a Valor 525-T and I am in the process of changing the wick but noticed that there is only one cog on the wick winder where as the pictures I have seen online have two. The wonder doesn’t move the wick case up correctly and skips on the cogs. Should it have two and can you replace the winder? Also if you can does anyone know where you can buy spares from please. Thank you in advance for you knowledge and advice.