If we can sustain these sort of finishes (or higher) for the next couple of years then inevitably we will have to increase the stadium.
We took over 50,000 to Wembley when we were in League 1. So undoubtedly we could fill a big stadium, but obviously question marks on 50,000 on a regular basis.
40,000 is not unrealistic. And we need to keep our record of having the largest stadium in the South-East of England