It would be ok if you can find it. It's been dropped from the Col. catalogue for years. SL 2009, a reintroduced is sold as well as Life, Spirit etc. but no Cyclex types at large. Any frames could use SLX. Some builders chose SP or OR SPX.
Often times SP was used, the frames may or not stated much other than Columbus.
A little later on the same applied to some SPX on "SLX" frames, rarer though.
By the time SLX was popular, it was more common to not "mix" for frames (later 80s) dedicated to the states. Very few companies imported SP,SPX by the '90s.
There are as many exceptions as rules. Europe saw more variations than we.
If you're focusing on SLX, you're focusing on the wrong thing. Better tubes prevail.