Peri- I saw those pre-made setups in the store for $15, and realized I could make a double-bouy version for half the price, a signifigant savings for my four traps. For weight, I've got about a foot of 5/8" steel rebar siliconed inside the pipe. I don't need to worry about rust because the pipe has endcaps cemented on. Since I don't have the lead donut weight, they fit fine in the rod holders with the heavy end down.

BTW, if anyone needs 'em, Pacific Industrial Surplus south of the stadiums on 4'th ave usually has shrimp and crab buoys for $3.50 and leaded line for 8 cents per foot.