I removed the dawer cabinet between the original twin beds and used those drawers in the front under the tv. I cut new twin beds from a king size memory foam mattress, rebuilt the storage area beneath the beds and used the same baskets for storage that were used under the frotn couch/bed. I cut plywood pieces that would fill the gap between the twin beds and made cushions that would fill in the space between the beds, so we have a California King size bed in the rear or twin beds depending on sleeping needs.
Moved drawer cabinet under TV and have removable table between beds
Four storage baskets under each rear bed
Plywood pieces fit between twin beds to convert to King size
Side cushions fit between beds to form a solid King size bed option