After another session, I have the basics of a tender hashed out.

This started life as a Robinson tender behind a Director, however with the coal rails removed and some of the width cut out of it it's not too far off the Pollitt 4000 gallon type. I then set about securing the loco body to the chassis.

Wooden block in the smokebox, hole drilled into it, then a brass woodworking screw re-uses one of the body fixing positions in the chassis to screw into the wood block.

Another wooden block at the rear of the chassis has a lip filed into it to lock into the footplate. Eventually this will be filed down a little and form the basis of the cab floor.