I found the plans for a necron
dda base online and had a friend with a 3d printer run me off a set, here's the results.
Did they work?
THEY FIT LIKE A PAIR OF GLOVES!
I put a pair on the ark and it gives it a rock solid base that will keep your ark from tipping and breaking your gauss guns whether you build a
DDA or
GA.
I can really recommend these now. If you're tired of your arks tipping over, the rods breaking off in the holes, etc, these are for you.
EDIT: I tried just one and still found it to be very stable and secure, so one may be sufficient.