[Need X ray Mod]

Well you never tried to come up with some bogus reason that you needed the xray mod, so yeah it was @OP.

I've got no problems with people cheating, it's up to the server owners to catch those people.. but I don't get why the OP has to lie about it. "Thrill of digging" Haha.

[Need X ray Mod]

Rather than pretending you're using it for other reasons, you may as well state that you're using it to cheat online.. because you are.

If I'm wrong in my assumptions, how about just crafting yourself a divining rod? That way you get the "thrill" of digging while finding ores yourself. Unless the server you play on has that disabled..

[How to make Tekkit lag less?]

have you tried going into appdata then to the tekkit folder in the technic launcher and opening the options file, then at the fps put it as high as you can and want c: just dont exaggerate, or maybe you haven't allocated enough ram? (though by now everyone should know this) anyways it worked for me I was getting 15fps and then set it to 50 because I had the option at 0 which.. its pretty bad, but its great and hope i help alittle

I'm fairly sure 0 means unlimited..

[Absolute WTF: Strange noises underground such as digging, eating, etc while on SINGLEPLAYER.]

Sounded like it could've been an enderman moving dirt blocks.