Just before Christmas a game (AC: Revelations) showed serious graphical problems such as flickering textures, stretched models, and various other anomalies. Other games seemed fine but I couldn't find anyone complaining about any particular problems with that game. What I did find is people having the same issues in various games because their PS3s were overheating. I'm not afraid of tinkering, so I'm thinking of replacing the fan (which has been rattling for the last couple of months) and replacing the thermal paste on the heat sinks. There are 1001 websites and online merchants out there selling parts, most of which are probably utter garbage that either don't do the job or only last five minutes. Does anyone know of a seller that is proven to be good? (Preferably from personal experience.) Note that my budget is rather limited so going to Sony or an 'official' source is not an option.