From the look of Roger's photo of the V7 interior I think that the width is plenty wide enough for anyone who uses the tent, including "bigger" folk. I really don't see why I, who am not "big", should carry all that extra unnecessary weight just so some bigger people can live in palatial luxury. This is BPL, after all, and I'd like to keep the weight down as much as possible, while still accommodating basic spatial needs of bigger folk. Remember, for anyone who is smaller (and there are smaller folk out there, probably just as many as bigger folk), especially women, all that extra width weight adds up, and one of the defining factors of Roger's designs is their light weight. Please think of the smaller folk, too, and try to bow to a compromise. You can't have one design and only design for the biggest and strongest. In checking about 10 different tunnel tent designs around the Web, from a number of different manufacturers, 52cm to 53cm width of the inner seems to be about average.
Also, it would be nice to, for once, not only cater to the American market.