I just bought a flat of tri-tip from Costco, who sell both the full Tri-tip, and a tri-tip that has been cut into "New York Strip" style steaks, which is what I bought. I was thinking that i should use the time / temperature that you have listed for skirt steak (56c & 4-8 hours). Do you think this is a viable assumption? These tri-tip "steaks" have marbling that I've not seen on Tri-tip before, which makes me think "less temp". So I'm kinda confused about things temperature that i should use with these "tri-tip steaks". Any suggestions?