Thanks Doug. I knew eventually you'd chime in. Over the past few days I've been leaning toward 66. Now it's confirmed. I guess if they were sitting side by side in the Store one's personality and appreciation for progress, or not, would decide your choice.

Me, I woulda chosen the Big Wheel. So New! So Different! So Compact! Same Tools! Same bag! Different Hope Coupler? oh well !!!
More from the 77 Manual:
"Defrost your Refrigerator"
"Blow up Party Balloons"
"Keep Christmas Tree Fresh with Sprayer"
"Make Records Play Like New" with dusting brush
"Dry Your Hair"
"Groom Your Dog"
"Clean Your Car"
"Sleek Your Fur Coat"
"Pump Your Organ" Yes, really, 'course they mean reed organ...
"Start Stalled Cars" Warm air on carburetors and gas lines
"Fast Freeze Fish" Spray with water to build up ice layers in freezer for long storage
"Curry Your Horse" Spray down with curry powder after riding hard...no, no, Upholstery tool sleeks the horse's coat.
The 66 can do none of these things. At least, the Manual doesn't mention them.
It really is a treat to have both of these models complete to compare side by side. Well, other than a hose hanger Wall Rack - I guess I better have two LOL - or a metal Ride Along Tool Rack for the 77. All in their own good time, I'm sure...
Dave