i recomended you a sinar camera with a metering back it helps you a lot , i usually do still life with an 8x10 tachihara camera and is really dificult , the movements are extreme for the dof and then the bellows extension and to meter the fall of light due the extension. again if you can please buy a sinar , you enjoy a lot , work more effective , less faults .
only one complain , the price of a exc 8x10 sinar p2 mb it could be more than 4000usd,