Hi Sam
Unfortunatly you do need to keep he keelband as it in the class rules, these can be downloaded from this site under the technical section, the rule you need is 8.4 xiii and reads as follows
A keel band, minimum section 9mm wide by 3mm deep, maximum section 22mm wide
by 10mm deep, of any material shall extend for a distance not less than 3500mm,
measured along the keel band, from the aft face of the transom. The radius of the bow
forward of a point 3500mm from the lowest point of the aft face of the transom,
measured along the base line, shall not exceed 11mm.
Hope this helps
Neil