
With this one, I found a good back piece, which had been part of a small crate. The side pallets were a pair. For each one, I took off most of the planks from the back, which were sawn in half and used to run in the gaps (making them small enough to stop compost spilling out but large enough to allow air in). I left a "collar" round the top, which will be a convenient place to rest tools (or cold drinks!). Side panels were nailed onto the backboard, with the construction being strengthened with a cross beam (picked up from the same pile of scrap wood). You can see my rough and ready joinery skills:

To finish it off, I dug out a square of the grass (well, mainly moss!) and used the lifted turf to give a lip at the front. This will stop composting material spilling out and, although not permanent, will be enough until I build up the hedge next to the drive and give the bin a bit more privacy.
It was a project involving a few hours and some hard labour but the only cost was a bit of electricity (I used an electric saw to cut the planks in half longways) and overall it was very satisfying.
Wulf