I've found a great free model: https://www.thingiverse.com/thing:2904604
...and I try to print it out and paint it at my best:

It's huge and full of details:

It's really nice to paint !


17 engine of the same size of the 11 of the CR-90 (I use it for rescale),

...and 6 laser turrets


Here's a size comparison:


Now I need your help for set-up custom rules !