Cleon
Legend
Actually, why don't we give them the +4 strength difference that's the normal advancement from size Small to Medium?
It's sort-of in keeping from the rules and increases the difference from enlarge person.
So how about this for the revised Enlargement?
Enlargement (Ex): A kamerel with 6 or more Hit Dice can enlarge its size to Medium as a full-round action. This size change gives the kamerel a +4 size bonus to Strength but does not alter the kamerel's other ability scores. The enlarged kamerel gains all the other benefits and penalties of being Medium size. All equipment worn or carried by the kamerel is similarly enlarged by this ability, but instantly return to their normal size if they leave the enlarged kamerel's possession. This means that projectile weapons deal their normal (Small) damage. Size enlargement lasts as long as the kamerel remains conscious or until it reverses it (a free action).