MPMD Litho Frame Column Shield

I was wanting to provide a little extra space for my effector when printing close to the edges of the bed. My existing column shields were a little too large so I designed new ones that hold lithos (since I added LED lighting inside the columns) that could be removed to provide easier access to the belt and motor gear.
The new guards connect inside the columns rather than into the outside grooves. They hold a piece of any material that has a thickness under 3mm and a width of about 55 mm. The f