Check if the ks is stealth routing. Not many stealth 27.2 frames out there.
Did the cheap RSP thing and to be fair it worked for a year or so then gave up. Cheap, a bit agricultural but gets the job done.
Against advise I went for the x fusion. Couldn’t stretch for a Thomson. It started slipping after a few rides and I thought crap. But then I replaced the inner and outer cable and put a load of grease on the mechanism at the top of the tube. Been perfect since (few weeks and several rides later) so, so far so good. I guess time will tell. The original fit cable is crap, got wet and rusty which contributed to the problem.
I hesitate to say I like mine! Hope it keeps going