Thanks guys, with your help I figured it out. I'm actually just testing some things out. Its not a final model. I have another quick one though. I'm trying to 'cap' a curved surface that was lofted out from my model. but obviously planar wont work..but then neither does blend or network. Any tips here?

I really want to learn this style because I have to do quite a few 'semi-organic' models (camera bodies, car bodies etc) and solid modelling isn't allowing me to get the nice curves I need :) (I try to combine techniques though of course)

I have attached the MOI model file this time too.

Much appreciated!!