I know I should probably post this is the rules section, but since we're already talking about these clubs...just for my own curiosity: Are these adjustable drivers "legal" for competition according to the USGA?
All clubs may incorporate mechanisms for weight adjustment. Other forms of adjustability may also be permitted upon evaluation by the USGA. The following requirements apply to all permissible methods of adjustment:
(i) the adjustment cannot be readily made;
(ii) all adjustable parts are firmly fixed and there is no reasonable likelihood of them working loose during a round; and
(iii) all configurations of adjustment conform with the Rules.
During a stipulated round, the playing characteristics of a club must not be purposely changed by adjustment or by any other means (see Rule 4-2a).
I figured these would fall under the (i) section of the change being readily made which would make them illegal but who knows.