Topic: 15mm skirmishing, Rebel minis

So I have set a goal for myself to learn a few rule systems and decide on one.  I  really like Starmada Unity so I have selected it for spaceship gaming.  I am now looking at 15mm skirmishing or maybe bigger sized battles.  I have Defiance but not Evolution of Arms.

One requirement is to be able to use what I currently have and try to give the forces a different flavor from what is already in the book.  From what I have read so far and in the past (I've had it for some time but never tried to focus on one system before) this is possible.

Just wondering if anyone has made forces from Rebel Minis Sahadeen, Titan Force or Earth Force figures? 

I will probably start out using my figures as whatever forces are in the book to learn the rules but then customize it once I feel comfortable.

Is there a spreadsheet for designing your forces?

Thank you!