I've seen quite a few online that were sumo'd up. I thought they looked really good. I wouldn't mind having a 600 or 65O sumo'd, not sure I'd spend the effort on the 400 unless I never rode outside of town.
Spent three hours and 2qts of fluid trying to bleed the front brake yesterday. Never lever, no pressure, no air bubbles- nothing. Weird. Decided to give the ziptie trick a go, so headed out in a few to see if that performed any miracles while I slept.