Myself.. I wouldn't try a coldset. I spread mine to get the 130 mm width in. Minor hassle each time... but easily doable.

I've heard a few incidents of frames getting off center.. etc... cold setting. I'm sure it can be done.. just I figure what will go wrong.. will for me. I have a toss out frame sitting here.. I might experiment with that one. IMO.. a symetrical rear in one of these comfort bikes geared to the heavy rider would be a sound marketing stradegy... IF.. a company would stick with the model and allow a reputation to develop. But then the kids so often roaming the sales floor peddling bikes likely wouldn't move it. Most of them couldn't sell life jackets to people bobbing in high seas.........

Check to the $$ game in marketing wheels. Keeps the coins moving in the economy... though.