Just installed my new 28cm Sender Unit and it really is an easy job. I bought the fitting kit which the website said was needed, but that only seems to be for a fresh install, not a replacement. Haven't driven the car yet (still 60mph winds and rain/hail here in the South at present), but it works and still shows 100% as expected (tanks full). Fingers crossed for a better and more accurate run when fuel gets used up.....