I had a brain drain yesterday. I was watching Midwest Crappie yesterday afternoon on the internet and saw the segment on porcupine fishing structure. I thought why couldn't you make one out of a segment of say 3" or 4" pvc pipe and use your hole saw to cut holes in the pipe and slide in 1/2" or 3/4" short pieces of pipe. Watch the segment and devise your own with scrap pipe.:D