I use two 3/4oz egg sinkers They slide right in the 3/4 inch PVC. I have a few made with old bolts I dug up out of the lay down yard at work. The next thing I going to try is I have some 3/8 inch Copper pipe couplings I'm going to fill with lead. they are just about as long at the two egg sinkers plus when I drill the hole in the cap for the ***** I'll have the cap setting on one a drill a pilot hole and then come back and drill a bigger hole that when the weight slides down over the ***** and there will be no need for the foam plug in the cap. the area in side the coupling is just a little bigger than the area of the egg weights so they should weigh just a little more. It sound like a lot to go though to build jugs but when I can't go fishing all I do is think about it and prep for it.