I don't know were you can get a YT-2400 with the turrets, but I think I know how to modify it...... First, get yourself a nifty little program called Mx/vtED. I think it allows you to edit turret data..... Just copy the turret axes from the Otana. I tried on the TIE Defender... It didn
 't work. Good luck
 
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 You don't know fear untill it comes in the form of heavy weapons