Well were both getting the squeaks on our XK so not sure what the issues are with the wk. the stock ones still raised an XK which is heavier out back then wk so you should get more lift then Matt got with his stock length ones installed. The tape part is probably tapping the rubber sleeve in place but I don't think that will last to long.
That's eexactly what I do to mine but it only happens to my passenger side. I throw a good glob of marine bearing grease on it and it lasts about 6 months.