Hello I have a version 13 slimline psTwo, scph 70001. I have tool a, b and c in place properly because the swap magic disc boots up fine. However, there are some problems I am running into. The first 2 games i backed were GTA liberty city, and budokai tenkaichi 2. Worked perfect, great loading times. But then, I started backing up more, and some dont work, Backed up Resident evil 4, works perfect. Backed up guilty gear slash, No go, but the original works fine. I gave my disc to my friend (backed up one) it worked fine on his modded ps2, he doesnt use swap magic though. Guitar Hero II back-up = NO GO! works fine on my friends modchip, I am using Verbatim discs, its not like its a low quality cheap disc. Now when I go back to GTA and Budokai 2, sometimes it doesnt work, gives not valid disc errors, sometimes it does work and sometimes it lags horribly and freezes at loading screens. I dont know why sometimes they work, sometimes they dont.. and sometimes they lag. Its not my burner cause they work perfect on my friends ps2 eh! I am so confused... before GTA worked perfect, played everyday, loaded 100% it loads about 50% now properly. It cant be my laser, its not even a month since i bought the ps2 slim... I dont know wtf is going on!