I just ordered two TW Tornados for myself and girl. My question is: can regular 510 Atty's and Cart's from any vendor be used, or do I need to buy replacment Atty's and Cart's from TW? Also, TW offers Mega Atty's and Mega Cart's. Are these better than the regular TW parts, and why? I just want to make sure I'm getting the correct and nesessary replacment parts up front.Any other help and advice would be appreciated re: TW Tornados and associated parts and pieces.

