Arms reach cosleeper!!

Anyone have the Arms Reach cosleeper?? Just set mine up & I’m super excited!

However, I did notice the instructions say to use it with a mattress that is flush with the bed frame. Our bed frame extends past the mattress & apparently that’s not “acceptable” 🤷🏽‍♀️🤷🏽‍♀️

Also says for the cosleeper to be no more than 1/2inch away from the bed... ours is 1.5” away

Idk what the difference is really?? Anyone have the Arms Reach & still use it with a bigger gap?

Thoughts? Comments? Think it’s ok to use as is??