TWEAKING?

I am brand new to this "sport", and I have played the game as a child just to watch players go round and round, sometime backwards.

I have watched some videos of gameplay via this site that are very impressive and I am in love with the game now, so tell me, is "tweaking" the key to success in preperation aside from some of the obvious (level board, etc.)?

Can someone give me a good definition of TWEAKING?

Also, are there any still pictures of "tweaking in progress"?

(I did see the buzzball video, but the demonstration wasn't close enough)