I had a little bit of time and I was able to finish construction of the 'Koptas and got them all primed.  

I am now beginning 'masking' off parts of the 'Koptas for the final paint job.  There will be some areas that maintain the black.  The circular masks I am planning / hoping to make individual icons for each of the 'Koptas.

I'm not sure how useful the Kill Saw will be in game terms ... I tend to think the 'Koptas will be best as a medium distance 'pick and move' type of unit.