I have made a modification of the R40 sofa in the master bedroom. Sometimes additional space is needed for kids and using the sofa isn't really helpful. So I bought a slice of gaboon plywood that I ran in a CNC machine and added a chrome leg. I then ordered a custom foam mattress. It's easy to remove and can be stored under the master bedroom mattress and the mattress can be stored in the room under the master bedroom mattress. But one problem of course that when use it's not that easy to store the original pad.
R40 modification of sofa in master bedroom
R40 modification of sofa in master bedroom
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