The rear step was a bit of a faff as you have to open both doors to use it, and it leaves a gap under the door when it's out. So, you've got to retract it at night, but once you're inside it's quite hard to open both doors, lift the step up, and close the doors again without falling face-first out of the back.
Dave had an offcut of ladder from his vastly over-engineered custom Ibex roof-rack / roof-tent install, and amazingly it was absolutely perfick for the gap we had:
We couldn't have made anything that fitted better - 4 bolt holes and a couple of clips and it's sorted! Thanks Dave!