The standard MX250 kits require modifations to fit the Mk2 shell as shown:
The kit is trimmed back to follow the wider profile wings of the Mk2:
The front end fits against the MX5 scuttle panel in the same way for mk1 or 2:
Small sections of the Mk2 rear wings require cutting out or knocking in with a hammer to clear the rear air scoops on the MX250 wings: