Michael Daly wrote:

Unfeathered paddles, contrary to popular misconception, require wrist rotation.
However, it is small and opposite that required for a large feather angles.

I beg to differ on this point. I find that using an unfeathered paddle -
with a loose grip on BOTH hands - requires no wrist rotation at all. The
key is to NOT use a control hand. I find that people who are used to
paddling with feathered paddles often have a hard time grasping this
concept (pun intended), since a control hand is an integral part of
feathered paddling technique. It takes some "unlearning" to get used to
not gripping the paddle on one side or the other.

When I paddled with an unfeathered Euro, I simply let the paddle float
in my hands and let the blade find it's own orientation in the water.
The fingers on the lower hand merely hooked the shaft and the upper hand
was relaxed and merely pushing.

With a GP, I use the the typical canted stroke, which is guided by a
straight wrist position and the pressure of the fingers wrapped around
the shoulders of the blades. Again, my hands are relaxed and not
gripping the paddle at all, the lower fingers hooking and the upper hand
pushing.

Of course, this is all for paddling in normal conditions. Gripping the
paddle is obviously necessary during certain maneuvers and when
conditions are such that a loose grip could result in losing the paddle.
Still, it's important to relax your hands/wrist as much as is reasonable
under all conditions.