1HBH needs a strong, abrupt, short or quick brush up impact on the ball. Its a must as the saying goes "all shots are not created equal". If you cannot do this action on afrementioned impact, you may have the wrong grip and wrong timing sense of stepping onto incoming ball.
Kuerten, Gasquet, Henin are way too advance to exercise consistency in their expertise. They all have a very advanced sense to the incoming ball. Ball is hit very far out in front. If you're not following the ball where it would go in advance, stay away from their grips.
The later your instinctive reponse is, moving grip to continental is discreetly advised.