Need Help. Is this a lock?

[tomm5647]

Hello all. I rarely post but i read everyday and I really appreciate the information and insights that are available here everyday. I'm asking for your input on tomorrows 8th at Aqueduct. I have #5 Jack's Express in my stable mail. He raced 2/24 finished a tiring 4th and was claimed by Gary Contessa on that day. Contessa is wheeling him right back in the 8th tomorrow. 5/2 ML and I'm thinking to back him BIG. Am I nuts? What do you think? Don't worry you won't hurt my feelings. be honest.