Did you want the cross-braces just out of concern for the long panels bowing out or for another reason? I plan on having as much flow as I can manage so I'm wondering if I might need to go the cross-brace route for that reason.
It was suggested by a member on here to avoid panel bowing. However Derek assured me that with the top eurobracing, the panels would not bow. I probably should have listened to Derek. Worst case is that if the cross braces become too cumbersome, I can always drop the water level a few inches and have them removed. They were added on after and I expect they can be removed by just cutting the silicone seam. If I do decide to remove them, I will have to invite Derek over to see the tank and, "Oh by the way while you are here ..."
Dennis