[Arran]

Ron;
  A thin saw blade should be able to cut out those grooves, such as a hack saw blade following a straight edge, unless you happen to have a veneer saw, which is unlikely. The reason I suggested putting these on in one piece is if you didn't you would go crazy trying to line up each strip, and trying to get the grain running in the right direction, it's also what they did in the factory when they built the cabinet many years ago.
Regards
Arran