Vainikolo's selection continues his explosive impact on the 15-man game following his cross-code switch from the Bradford Bulls to Gloucester in the summer.
But the cross-code switch has not worked out so well for other young players, with the likes of Chev Walker and Karl Pryce both returning to their original sport after unhappy spells in union.
Continental Airlines recently threatened to switch their New York-Belfast service to Dublin: the improved cross-border motorway meant passengers could head south and avoid UK airport duty.