So I went ahead and ordered a frame today . 60 x 36 x 32 . 45 x 90 t-channel aluminum extrusion . 4 cross members on the top from 45 x 90 and 4 cross members at 16 inches using 45 x 45 . The top two middle pcs are removable so I can drop thick pieces onto the lower shelf . I'm thinking the side of the t-channel will be rigid enough to support the linear rail . I have a friend that can supply me with aluminum plate for the top , i'm thinking 1/2 inch . Any things I should watch out for ?