Now the inner weights are in place. I'm using 2 10# weights, also from Walmart. These are important
as they hold the 3/4" nut in the middle of the base weight from pulling through. These can be
tightened down so they hold the nut, then the outer weights can be really tight as they are
pulling against the far inner nut. The nut we pressed into place just holds things together
during assembly. It may be better to use one 10# weight, as the clearance between the
3/4" shaft and the axle shaft is very tight.