4, 2.5 inch pvc couplings under the cut light diffuser and you can save the glue. the pvc will also keep the egg weight from warping the shelf and sagging into the water. i use this method of incubation and have no problems, but you need to be very sure that your incubator does not move around much. you will need to find a way to keep the babies from going under the shelf. i put them in a seperate container to come out of the egg.

good luck. if you use a probe in container make sure it does not fall through the crate into the water.
howard