You changed it again so let me have some tries. At first glance it seems impossible to solve without the pink. I think the linked whites are not required but it surely is more challenging. Nice improvement.
Yep... definitely whites not needed (although used as obstacles in the way not helping out).
No problem. Glad to be of assistance. I am pretty sure you will find a way to make exactly what you want and it will be great, like most (if not all) of your levels.