Thanks, it came out a little better than i expected also, but time will tell as in anything new, the good thing is if it doen't work out it would be very easy to take out, just two pieces.
i still do have a 3" sand bed in the fug which is 48x13, so that should function for the tank.
i was filling the tank today and the in-tank overflows both came apart at the seems from the pressure, i had to drain the tank again then run to the plastics supply place and had them cut me a few pieces, i bonded them together and just finished putting them in the tank and put chaulk all around them, now i have to wait at least 24-36 hrs before filling the tank again....bummer, i was all ready to have it filled today and check for leaks since i also ran flex PVC for the overflows and return 12' into the next room where the fug and utility room is.