In the main saloon of my SO30i there are two benches each side of the folding table.
Unfortunately they are not large and cannot be used as berths as they are.
The starboard bench is only 1.8m but the port bench allows your feet to stretch out below the chart table.
To overcome the narrowness of the bench in order to use one of them as a midship berth I made a wooden foldable construction.
I have now ordered a mattress in 1.5m x 0.28m with 10cm thickness to fill the gap.
To shift the supports and to lift the extension I added a line.
Hansi - SO30i - SevenEleven - Germany