Today I managed to complete the diffusion plate. I would like 100% of the tanks overflow to go through the skimmer and decided to cut the bottom of the chamber to accommodate a 1.5" bulkhead which will be plumbed directly to the overflow of the tank. I'm not sure how this would effect the performance of the skimmer, but I'll be able to make some mods later if there are any issues with the design
After making a sketch-up of the hole pattern I made a printout and taped it to the top of the chamber. Using a drill press spent about an hour or so drilling all the holes. I hope that this would be enough.
Here is a pic of inside the diffusion chamber where I'm hoping I get a good mix with the tank water and the air from the needlewheel
