I have loved every futon, shikibuton, & thin wool mattress I've ever slept on, & my Western mattress is nearing the end of its life. So I'm going to pick up a queen-sized shikibuton from Rock Soft Futon in Oregon, US. They will top up the cotton as it compresses over time for $40, for as long as RSF is still in business, so that's very attractive to me. Infrequently, my cat makes a mess on the bed, so rolling up the bed for longevity & cleanliness is also a big plus. However, I cannot sacrifice the storage space under my bed frame (otherwise I'd be posting in r/floorsleeping lol). So I'm thinking of bunkie boards on my wire frame. Does this setup sound okay, would I need tatami on top of that? My partner hasn't had the chance to sleep on any of these very-firm mattresses. He sleeps like the dead while sleeping on camping mats, but there is a concern that sleeping on a shikibuton long term will hurt him.…