I'll be ordering a large chuck very soon. Tired of stuff taking flying lessons off my GMC3 mini-chuck. Right now the decision is between the Barracuda 3 from Amazon or the Barracuda 4 from PSI. PSI does not list the 3 anymore so I assume it is discontinued. What I'm wondering: Is the 'cudda 4 worth the extra $50.00 over the price of the 3? Bill did a favorable review of the 4, so I'm curious as to his take on this.