just a suggestion......just built one for a 105 g......frame the front and back as you would a wall...double the ends and middle if you want doors other wise 16" centers are plenty. frame the ends as tiny walls and srew it all together.....that way ends are now trippled and will offer plenty of support. it is also simple to panel or cover with 1/4 inch ply wood....and presto ...couple doors and its done....hope this helps....i am a carpenter....good luck. :beer: