06-19-2012, 07:19 PM
I wouldn't hesitate to use the slots for lifting points on the table. It wouldn't weigh a fraction of the force you pull on the slots when you pull down on a clamp. The vice or rotary table create a surface above the slot, so your only putting it in compression, in that setup you couldn't possibly break the slot unless the stud goes through the t-nut.
Free advice is worth exactly what you payed for it.
Greg
Greg