Tabs were drilled to size and the floorboards were then match drilled. I am using ClickBonds in place of tinnerman clips as they are much stronger and will not fall off. Floorboards were fit very well from the factory and required only a bit of trimming to be fit into place. The floorboards under the seats requiring some trimming and bending to allow for the elevator cables to pass through. I highly recommend ClickBonds. The plate to cover the exposed area around the flap area was not overly difficult, took about 1.5 hours. The hole for the fuel sector was a bit of a challenge to get the right spot for the initial hole and then lots of time to slowly get it to size.