I've had the MLCS spline jig for so long I don't remember if it was sold as a router spline jig or a table saw spline jig.  At any rate I've used mine on the router numerous times.  Set up can be finicky but once it is set up it is great.  Another one of those jigs that you can make if you want to take the time, or buy if you need it now, or get it as a gift like you did.