Printed Some Wobbly Chess Bases

I made it back to the Makerspace after a few weeks off.  Tonight, I took a spool of white PLA filament and printed five (5) bases for the wobbly chess pieces.  This took about 2.5 hours and was all the time I had tonight.

I'll take the pieces home and glue them to the top pieces that I printed before.  I need to figure out a good weight to put in the base to make them stand up.  The Thingiverse instructions says to put in five pennies.  I'm going to try lead from Pinewood Derby cars.