My friend has a Hardcore Hammer Grind she really likes but it is getting on in years and games. She is righty but throws a backup ball, lower ball speed around 13 - 14 mph, lower rev rate, and usually bowls only on THS. She likes to throw much like a real lefty, that is, down the first arrow. If you could see her shot you would think a lefty threw it. She averages in the mid-180s and has had her two 700+ series with the Grind. She wants a ball that will get down the lane and turns with good continuation (who doesn't!). Because she throws a backup ball its hard for her to go out and around so prefers to stay down and in all night. Any ideas on what Motiv ball might be best for her?
Sigma Sting or Primal Rage would be a good one too.