We have never used the safety rails on the beds. At first we would put a pillow on the floor in case they fell out, but if they ever did fall out, they had wriggled down to foot of the bed and then fell out, so a rail would be useless in that case. Paige had a few tumbles though and in the end I put a pillow under the matress on the side to prop it up a bit so she would have to roll uphill to fall out and it really worked.

BTW Lucy, good luck with the Allan keys LOL.