I know I am starting all of this rather late, but I have a propapation tray question. I bought 1020 trays and the 72 cell propagation trays from greenghouse megastore. They are due in today. My 1020 have no holes. I was wondering if I could add water to the 1020 trays and then sit my prop tray (which have holes) into the 1020s to keep the prop trays moist. Is that what most folks do or are you watering your prop trays from above?