Torque lock or not.

I need to replace the synchro hub and slider for 1&2 because it is sticky in my t10. I've called some of the vendors guys suggested and I'm getting mixed opinions on the torque lock slider. I've never had an issue with jumping out of gear. It's been recommended to change the 3&4 slider just because it's apart. I feel like a new slider on a used hub may not make sense. So if I leave 3&4 alone, it seems like the 1&2 should stay the original non torque lock, or if torque lock is so superior maybe both sliders and hubs are in order. Any thoughts or experiences are welcome.