I understand the idea of dropping to 650b wheels and recognize how it can be handy in some instances. If I may quote Sheldon from that page...
Originally Posted by Sheldon Brown
650B Retrofitting Benefits -- Racer to Tourer
Does it make sense to change wheel size on an existing bike? Sometimes it may.
If you have a racing-type bike of good quality, but wish to make it more versatile, sturdy and comfortable, converting to 650B may be just the ticket.
Newer racing bikes tend to have exceptionally tight tire clearance. Some of them can't even accommodate a tire wider than about 25 mm, and forget about installing fenders with any size tire!
By switching to 650B from 700C, you suddenly gave clearance enough for medium-width tires, say 35-38 mm width, and for fenders, so you don't need to be a "fair-weather" cyclist.
Sheldon was talking about racing-styled bikes with tight tire clearances and 700c wheels. If you want to run fat tires and fenders on such a bike, dropping down to 650b wheels may allow it. But Skipjack2001's bike isn't a racing bike with tight tire clearances. It can already run fat tires and fenders with either 27" or 700c wheels, so what's the point in reducing the bike's wheel size?