1st pic this is the over all design of the sump
2nd pic this is a view from the front. I have two questions about this pic. Should the first baffle on the left in the skimmer section be taller? The second question. The two horizontal lines in the pics, the one in the skimmer chamber is for probes and the one in the return section is for my auto top off probe, I have these mounted at the same height as the baffle walls to their sides, is this right?
3rd pic
What you are looking at here is the yellow band around the top of the sump for support, itwill be one solid piece and will be around 2 inches wide.
4th pic
What you are looking at here is the wall between the refugium chamber and the return section.
5th pic
I saved this pic for last, I am not to sure about this idea
this is the box thats in the upper left corner in the first pic of the sump. Water drains from the DT into this chamber down thru pieces of live rock, breaking up the bubbles that the drain from the DT creates then under the chamber and into the skimmer section. I figure this is a good idea, but I want a filter sock also, what do ya'll think? Well thats about it, give me your thoughts.
The Beginning 
do I really need three baffle walls in the sump between the skimmer section and the return section if I am going to use a filter sock. In the sump I now have, I just have two baffle walls with a sponge filter in the second chamber, which I took out when I started using the filter sock. What I was thinking was that I could put alittle space between the first baffle wall and the second one, then I could put a few small pieces of live rock in that space and that should break up any bubbles from getting into my return section and keep them out of the tank. I could also then just have my filter sock in my skimmer section. I could also be worrying about nothing. I have never had a problem with micro bubbles but I have read about a bunch of people who have had major problems with them.
. The first section on the left, the skimmer section at normal operating depth 18x16x8 (without the skimmer in the section) 10 gallons, skipping the baffles and moving onto the return section, normal operating 13x16x7 6.3 gallons. Total both compartments 16.3 gallons, but like I said that is without the skimmer in the sump. Lets say the power goes out and the sump starts filling up. The total size of both the skimmer section and the return section without the baffle section is 31x16x17 ( I am getting the 17 inch from the brown divider on the right side of the return section) that would be 36.5 gallons. 36.5 minus the 16.3 normal operating depth leaves me being able to add another 20.2 gallons to the sump. Now that only is up to a 17 inch high baffle, the sump is 21 inches tall so I could really add another 8.6 gallons to bring it up to the 21 inch level and could still add more if you figure that if the water kept rising before it would overflow the sump it would also add more water into the refugium section and the top off section of the sump, I figure the sump empty will hold 87.3 gallon. But, like I said I could be figuring wrong. The part of the sump where I am really concerned about the noise is the over flow from the refugium to the return section. There is a 10 inch drop there, I just don't know what to do about it.