The Trenton/Culbertson tornado? I'm inclined to agree; it caused some of the most impressive granulation of debris ever recorded along with the Jarrell tornado, and was most likely an F5, although it caused no F5-level damage to buildings, leading to a rating of F4. Interestingly enough it occurred exactly two weeks after another extremely violent tornado in Pecos County, Texas, which was likely also of F5 strength, but rated F4.