i dont belive filer is required to make the boat fuller as my hulls have come up verry full up front, fuller than denholm hulls, which acording to one former mossie champ it is to full up front and it will hobbie horse in the chopy waters. this was achieved by overlaping the tape 1800mm from the front instead of 2050 mm as set out in the Phil Pierce instructions. i found this left a small holow in the hull profile up the front which was fixed by planing the front down to create the right curve and then re taped on the outside.