I've contemplated this many times, and is the reason I opted to use mic-6 for the table, and add t-track to that. Also, I think the t-table squeezes somewhat, twisting the rest of the extrusion. I think what you CAN do is bore through your long rails to make access holes, and bolt
the t-table from the bottom.
The other things you can do? add a couple more 8080 longwise to attach the t-table to, or simply affix a spoilboard and level that...