I've bought humidity domes that are suppose to be the only ones that fit a 11 x 22 perma-nest tray. I really would like to buy a few of the Mondi 7" humidity domes for height. One site says they will not fit? Personally, The ones that are "suppose" to fit the trays don't do that great of a job. I had to trim to fit my light stands.....any help would be appreciated.