Every time I put a game in it will play for a good

This is not nessesarily a solve issue, however it worked with mine, I had the same issues when playing games. I would be in the middle of gameplay, and the the error screen would pop up and say that the disc coudnt be read, All I did to fix the issue was open the unit, blow the dust off the disc drive motor and attatched ****, then I used some 3 in one oil on all the motors inside the system. So far it hasnt messed up (FINGERS CROSSED) I hope this helps.....I noticed with my gamecube that it would quit spinning the game, and after I made it past the gameplay loaded in memory it would error out because it needed to spin the disc and load more programing into memory.....if your disc dont spin you are guarenteed a disc read error