How long can I reasonably expect a hydro pump belt to last on a Lazer HP? Mine broke today with only eighty-five hours on it. What is the easiest way to change it, off-site? I asked the same question in another post in another forum (I had a bad day today), but thought I might ask at the source. Other than this, I'm pleased enough with this product that I talked a friend into buying one for personal use.