thanks for the positive feedback! the mkx has 63,500 miles.. its ovbious that there had not been a previous replacement of the spark plugs. the center electrodes were in decent shape, being platinum thats to be expected in a properly running engine.. the ground electrodes however were eroded away, and even with a cleaning and regap i would have not been convienced they were suitable for another 38K... so new plugs were used.
Will be performing other routine maintence here soon, will post some more how too's along the way. ~Andrew~