In regards to the "Mirror" subect, I am a bit taken back how it has become a hot point of discussion. I never gave my longer-extending mirrors a second thought for clearence to anything, except a time or two in very tight parking areas, I asked my wife to roll down her window and pull her mirror in, just for extra assurance. But I couldn't say that would justify getting shorter mirror arms.
In tight parking areas after we are parked, as a rule we fold the mirrors in for fear of someone bumping into them when walking by, or worse yet, having a child grab on and swing from one. I suppose that could be a good reason to consider shorter arms.
When pulling inside my garage, I pull in both mirrors or they would automatically fold in with much less grace when rubbing against the garage door frame. But that would still happen with shorter mirror arms.
My brother owns a Starflyte on a 1998 Ford E350. His rig is much narrower than any Phoenix Cruiser. His rig too has Velvac mirrors, but with the shorter arms. One thing I noticed when showing him how they fold in....the arms are so short, they required a lot of muscle to pull them in. Maybe that comes with vehicle age as well as less leverage.
I find it quite interesting to read here that Phoenix USA is now installing shorter arms on all their 2011s.