I've insulated most of it which is working well at reducing noise and increasing warmth. But I still need to get the units out to do behind them and wondering whether it is worthwhile. Tow bar fitted, new leisure battery.
Have serviced it and cleaned it. Running out of jobs (perhaps this is only temporary

So what have you done, what is the single best modification that you have done to make the T25 better?
(PS mainly used as a daily run about and camping trips)