Modified the brackets slightly, making the rear stronger and shrinking the microswitch mount.

Also edits to the rail effectors and hotend effector.
Brackets are smaller, bringing the motor in closer and the belt up against the rail effector, behind, the bearing bar.

Rail effector enlarged slightly.

The hotend effector isn't finished - I don't think it'll work in its current incarnation.
It's next on the list - hopefully finished before I print out the towers.

Paul