The left side slides around the table. I don't know why it's so hard to make four rubber feet for a keyboard to keep it from sliding.
You should pop by a carpet shop. They have a rubbery mesh that goes under carpets to keep them from sliding on wood floors.
You could also fashion your own non-skid feet by applying a
thin dab of silicone rubber to your keyboard's feet; it's self-leveling, so the keyboard won't rock once it cures.
Also a warning: Be very cautious about using rubber-backed non-slip carpets or carpet pads on any type of linoleum. A chemical reaction will occur over time — much like happens with spilled mustard or orange soda or crepe shoe soles — leaving a particularly ugly 'stain' which cannot be removed (other than by replacing the linoleum). Certain other plastics have the same problem (which will not be on the label).
