I know some people are buying batt. clamp pullers, there cheap and work good. I use this
http://www.amainhobbies.com/product_...oducts_id/5547
and this
http://www.amainhobbies.com/product_...oducts_id/4098
I also heat up the crank case a little ,comes off like butter . I know they are a little more $ however no risk no damage to anything and they last ..