Got tired of seeing those damn 3 lights on the dash, so I finally pulled the trigger and replaced the shuttle valve on my 2000 Disco. Ordered the replacement valve from Atlantic British - about $75. Read the different threads and took a shot at trying to do it without pulling the antilock unit, but no go, I just couldn't get enough clearance under the unit to get the allen screws out. So out it came. Wasn't really that difficult. Just take your time, mark the lines so they go back were they belong and you should be fine. Since I new I was going to have to bleed the lines, I went ahead and installed some stainless steel flex lines at all 4 corners - again from Atlantic British. Used my Motive Power Bleeder with a custom made adapter for the Disco resevior.