It could have got a bit nervy for Gloucester now but it was Narraway who gave them the go ahead again. He made a break full of awareness and power, Satala took over and then Cooper delivered a brilliant reverse pass towards Vainikolo, who burst through the last gap and to the sticks.
Watkins then got on the scoresheet when he picked up a ricochet in midfield to burst clear and score and Lamb's conversion made it 34-5. Calvisano were beginning to run out of puff now - Gloucester's first-half efforts were beginning to pay off - and with Greg Somerville adding the not inconsiderable weight of 67 All Blacks caps to the set-piece, Gloucester were well on top.
However, their fifth try came from Calvisano's one piece of pressure in the half. Number eight Alessandro Zanni carried off a scrum to the short side but when he attempted to off-load, Vainikolo nipped in, collected the ball and burst clear on a lung-busting break for his second try.
Lamb continued his immaculate kicking with the conversion to make it 41-5 and then with three minutes remaining, they scored their sixth try.
Rory Lawson found Lamb from a turn over at a line-out, Tindall thundered up the centre and he was able to delay his pass to perfect to send Watkins away and clear to the sticks to complete the scoring and the job for Gloucester.