The ship bases are very light and slide easily on playing surfaces when accidentally nudged. After bumping them around for several games I decided to see what I could do to remedy this problem.
Here is what I came up with:
First, I glued on fender washers which filled most of the space underneath the stand for added weight. (Note: if you do this, use very mild glue. The glue I used caused some clouding of the plastic which can be seen from the top side underneath the pilot card.)
Then I added tiny machine nuts to fill the gaps around my washers so that the entire bottom side of the stand was uniform depth (I used up about half of the gap space on the underside of the stand).
Then I cut out squares from a mouse pad and glued them to the washer and nuts underneath.
Voila! Now because of the weight and grabby material, my bases stay put very well.
As you can see, the base does sit about 1/16in off the table, but this does not interfere with the movement templates locking in to the "nubs" on the base.
Here is the mess underneath (you can see through the top clear plastic). Its embarrassing that I used the wrong glue and it looks pretty unsightly, but at least its completely covered by the pilot card.
I'm not usually into customizing my stuff and making a mess, but I have to say, the bases feel much heavier and more substantive in hand and they don't slide at all! I love em!