Total Seal Piston Rings Gapless Top ring?

I bought a set of 6 Ross pistons and a set of NIB Total Seal Rings. Had the pistons Ceramic coated at Calico coating along with antiscuff on the skirts. After opening the box of piston rings I find they are gapless top ring with a Napier second ring. I contacted Ross and they said I should be fine under 70-75psi of boost. Im running a custom S480 and I should be fine there. I have contacted one other member on here that I read back in 2008 was running gapless top Total Seal Rings and he had good results. Anyone care to give an opinion being im still waiting on parts before I assemble? Pros and Cons are welcome