Weighted Hex bases

For a bunch of little models that would often times topple over after being moved, I needed to add a little weight to their base. I decided to grab the heaviest washers I could find in my toolbox which ended up being M8 sized (see reference pic above) and model something around that. I measured the hex to be the same size as standard battletech hexes and made a base for land as well as air units.
The washer fits very snug, I never even bothered to glue them in.

----Edit---
I noticed I put the wrong dimension of washer in the description. It's actually an M8
Updated the picture as well