On 5/6/2014 10:41 PM, Robert M wrote:
Why is anyone aero towing with a tow hook that will back release?

Excellent question. In the U.S., looking back in time (e.g. the Schweizer
fleet), historical inertia? In any event, I've never owned a glider that did
NOT have a back-releasable, non-CG hook on it, and except for my club's
G-103s, never piloted one either.

Bob W.