had swift tach on my B2601 and opted to NOT get it on LX. I would save the $800 and skip it. If you have a 3rd function you have to get off the machine anyway to deal with that. The swift tach is a bunch of light duty parts that hang down, and get bent easily. When loading dumpsters the "ears" hanging down would barely clear the dumpster sides, plus I would smack my head on them randomly too. The levers on the loader arms often vibrate like crazy and make a racket. imho, it's unnecessary.
Removing a non-swift tach loader is still very easy, and very short work. Save the money!