Should the first bin (ie the one you put the fresh stuff in) of a 3 bin be bigger than the second? And similarly should the second bin be bigger than the third, due to the fact that volume will decrease as composting happens?
Any picture I see of compost bin systems have all three the same size - I'm wondering if this is just convenience of building rather than optimal size for when used.
As background for where I'm coming from here - I've got a L shaped 2.6m x 2m area to put a compost heap and a simple "row" of three bins would be a touch small, around 80cm per bin. I've the choice of making bin one bigger, or putting 3 bigger bins in an L shape, which may be better for compost, but will surely be a pain for moving compost in or out of the second "corner bin", even if I build with removable slats between each bin. My only other thought is to make the bins deeper/taller to make up for the lack of ideal width.