Ordering the conversion kit with the Toddler rail for the crib we are going to buy is a extra $100.00 which I would rather spend on other things. If I do order the kit I was told that I should order it when I order the crib in case the manufacturer decides to discontinue the crib. Seems like a lot to spend to put this rail in storage for 18 months or so. I have seen these mesh railings with a metal rail that you can purchase at BRU or Wal-Mart. THey cost a lot less money than the matching rails for the crib. Are they a good substitute for the matching crib toddler rail. Can they be used if you have a convertible crib that you change to a toddler day bed? Are they safe???