The RICO drilling is exact from from Ric mentioned before in other topics he's chimed in on. If I recall, its best benefited symmetrical balls. Mo doesn't visit this site since he has the other site, and he has discussed extensively about the MOtion hole with regards to symmetrical and asymmetrical use. I'd suggest if you haven't done this yet, is to go over to the other site and ask specifics there about the MOtion hole if you have more specific questions about it.