Fidget 608 to marble adapter

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 bu