Being a Series, mine already has the removable door tops, but it does get a bit chilly driving in winter without them fitted.
Mine could do with a new chassis at some point, question is whether to buy another Series with a galvanised chassis and 200tdi already fitted and swap all of the trick bits over from mine or to start from scratch with a new chassis. Buying one already done is by far the cheapest option as well as the time involved in fitting a new chassis. Once I've made up my mind which way to go, I'll fit a cage, no point fitting one at present to mine as it is.