I had one in my .177 Pro Sport and found it to be a very nice improvement to the shot cycle. I switched to the 12 ft lb unit and Love it. Never miss the few extra ft lbs and the shot cycle and cocking effort are Fantastic!
Still an excellent hunter that drops rabbits in their tracks and the same performance on squirrels,be it head or heart/lung shots out past 35 yds.
That said,I think you'll be quite happy with the Vortek SHO kit in your .22 TX.
Hope this helps.
Mike.