Hey, I just got here about a week ago, and I'm enjoying the site quite a bit. I especially liked your Tetris Worlds guide, and I think you should incorporate the "clear everything with Tetrises whenever possible" mantra into the Tetris DS guide. I've got a question, though - I don't quite understand the concept of leverage. Why are garbage clears worth 'less' than regular clears? Why does a (non-BTTetris have four different leverage values depending on how much garbage it clears, despite all of them sending four garbage lines to the opponent and clearing four lines off of your screen? And why is a triple garbage clear the least valuable? Going by your Tetris Worlds guide, I'd think that single clears are the worthless ones. Otherwise, great site and guides!