If you are using different weights on your rigs, I would recommend coloring the top face of each pvc tube with a corresponding color.
Id use a sharpie and for example mark 3/8 as red, 1/2 as blue and 3/4 orange, etc...
This way, you wouldn't have to pull the rig out to see what size weight you have on each rig.
if you only use one size weight, then never mind
