I don't recall Thomas and Thomas ever marketing a rod called SLT. Their lineup in the 90s consisted of Horizons in three varieties, the LPS, and Paradigms. I have many, many T&T rods and have used their warranty service on a couple of occasions and they always came through. Slow, but they honored their warranty. Having visited the plant, they are very, very small. We aren't talking SAGE, or even Scott. TINY. It is amazing that they are able to still be in business in the day and age when most companies are contracting their blanks off shore. Trevor Bross is the person to ask for. Good luck.