Thanks Illogikal. I am going to copy your idea and Spares together. I will use the liner out of two old ice chests and foam it insideo a seat box. Is your seat the right hieght? It looks low to me, but i have no idea. I was hoping to be able to make a small leaning post/seat on each seat box,kinda like what Willy put on Fishbones but not as wide.
We have lots of cats around here so kitty hair is no problem.