http://gametechmods.com/uploads/images/83866Safety%20covers.JPGhttp://gametechmods.com/uploads/images/83866Safety covers.JPG
Heres an idea of what you can do (Image by me!)
The spikes are covered up by the faom tubes, as the other one is a bar screwed over the lifter, but if your robot isnt like these lifters, no spikes or like that, then it should be ok.