I had to order some more cheap bearings.35 cents each eBay.
$5 each at my local bike shop.YIKES
Thinking of what else I could use for weight, large nuts cost almost as much as the cheap bearings.
I came across this thing http://www.thingiverse.com/thing:2051364
but i already had a few other 608 types printed.
So here it is a 608 to marble adapter.
Amazing what pops in your head at 3:00 a.m.
I found 14oz bags of floral marbles at dollar tree.
Size and weight are not consistent but good enough for gimmes.
So many different spinner designs now.
They should replace any 608,22mmx7mm,bearing.
The marble size should be around 15-16 mm.