have tried DIY fuel filter changing.. however sobrang tigas.. which made me wonder?? ang pag higpit ba nito ay counter clockwise? or clockwise? baka kasi its diff. from the normal tightening and loosening style. Also san kaya makakabili nung metal na kinakabit sa filter... so as to tighten and loosen. Nakikita ko ito sa mga shell so as not to use the chain or belt in tightening.