Cockpit Width Increase is a mod with makes a little more room in the cockpit where the door flange rubs against you upper arm. The door recess is cut as the measurements in the instruction a splash moulding is placed in the recess area and a new flange is created from 8 ply’s of Bid. The door is cut and a moulding is put in its place. I have found the Mod a really good thing, and has made sitting in the Europa XS a Little more Comfortable.