Any ex jersey mikes employees here? Tuna question

Back before it was bought out, Jersey Mikes used to make the best tuna salad sub I’ve ever had. Does anyone remember the recipe? I’ve gotten close once. I think it was chunk light tuna, and way more mayo than seems reasonable. Given its Atlantic City roots, I assume it was Hellmann's and not Duke's or Kewpie. Were there any other ingredients?