Adrian - Lovely photos. Poole one of the few yards I was refused entry to, and I only ever saw the CBs in Whitemoor, very closed in and on poor days. They all worked from Lenwade, as you say a right motley collection, the 3 axle bogies were very crudely cut from earlier wagons and unfortunately were renumbered - I expect others know the origin of each one.
No need to give lots of info, the diagrams are in the Specially constructed diagram book on the Barrowmoremrg site - see 2/800 - 05. All the running numbers are given.
Paul Bartlett