Paul, if you can post some pics of various designs so I can get an idea of what can be done, that would be great.
Here are some of the stands they built for us.
I don't always remember to take pics there are a couple really custom one's I still need to get a hold of the owners to get pics.
This is a close up of the exterior welds they grind them down so they are finished.
<a href="http://s668.photobucket.com/user/PauLCa916/media/Stands/IMG_0051_zpsc1e75609.jpg.html" target="_blank"><img src="http://i668.photobucket.com/albums/vv50/PauLCa916/Stands/IMG_0051_zpsc1e75609.jpg" border="0" alt=" photo IMG_0051_zpsc1e75609.jpg"/></a>
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<a href="http://s668.photobucket.com/user/PauLCa916/media/Stands/IMAG0760_zps257c6736.jpg.html" target="_blank"><img src="http://i668.photobucket.com/albums/vv50/PauLCa916/Stands/IMAG0760_zps257c6736.jpg" border="0" alt=" photo IMAG0760_zps257c6736.jpg"/></a>
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Note: The top of this one is a 1-1/2" x 3" tubing allowing spans up to 96" with out center legs for better access to the sump area.
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<a href="http://s668.photobucket.com/user/PauLCa916/media/Stands/e4a1653a-51a6-49f3-9162-4c8723bfd315_zps0f91c7a8.jpg.html" target="_blank"><img src="http://i668.photobucket.com/albums/vv50/PauLCa916/Stands/e4a1653a-51a6-49f3-9162-4c8723bfd315_zps0f91c7a8.jpg" border="0" alt=" photo e4a1653a-51a6-49f3-9162-4c8723bfd315_zps0f91c7a8.jpg"/></a>
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<a href="http://s668.photobucket.com/user/PauLCa916/media/Stands/aa4c5efd-a5a0-428e-aeb1-c3a34d0da225_zps8c573c14.jpg.html" target="_blank"><img src="http://i668.photobucket.com/albums/vv50/PauLCa916/Stands/aa4c5efd-a5a0-428e-aeb1-c3a34d0da225_zps8c573c14.jpg" border="0" alt=" photo aa4c5efd-a5a0-428e-aeb1-c3a34d0da225_zps8c573c14.jpg"/></a>
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This is the top of the one above we used the 1-1/2" x 3" tubing laying side ways so the customer could use a 72" sump underneath and still put a 72" frag tank on top.
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<a href="http://s668.photobucket.com/user/PauLCa916/media/Stands/97123543-0d5f-4453-a908-57e8430eb0ac_zps115ef4aa.jpg.html" target="_blank"><img src="http://i668.photobucket.com/albums/vv50/PauLCa916/Stands/97123543-0d5f-4453-a908-57e8430eb0ac_zps115ef4aa.jpg" border="0" alt=" photo 97123543-0d5f-4453-a908-57e8430eb0ac_zps115ef4aa.jpg"/></a>
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<a href="http://s668.photobucket.com/user/PauLCa916/media/Stands/21DCA838-3D78-4C5C-AE4A-4B40118489A8-2525-000001C19A6E85D4_zpsec182e7b.jpg.html" target="_blank"><img src="http://i668.photobucket.com/albums/vv50/PauLCa916/Stands/21DCA838-3D78-4C5C-AE4A-4B40118489A8-2525-000001C19A6E85D4_zpsec182e7b.jpg" border="0" alt=" photo 21DCA838-3D78-4C5C-AE4A-4B40118489A8-2525-000001C19A6E85D4_zpsec182e7b.jpg"/></a>