DISCLAIMER: NOT MY PHOTOS - This R2R reefer made a chaeto sandwich out of eggcrate. He flips it over on occasion, but it doesn't tumble and he stated that he didn't have any die off on the underside. To trim it, he just lifts out the sandwich and does some weed eating with scissors. I thought it was kinda neat and saved the pics. I should have saved the link to his thread also. ;Sour
Hopefully he will see his photos and give us an update.
EDIT: I found his thread - https://www.reef2reef.com/threads/chaeto-egg-crate-sandwich-idea.144659/https://www.reef2reef.com/threads/chaeto-egg-crate-sandwich-idea.144659/
That is cool idea!