Mr.NPK, whoever you are. I have been selling this item for some time now and so far all are satisfied customers, if you have any problems with the other mark x or william or efi that you have mentioned, please settle your issue with him. I have not seen the other seller before and we may be selling the same things. maybe you want to sell the same items and like to bad mouth me but try not to do so. I believe you owe me an apology too. There are many sellers there, so be careful on your side also.