Originally Posted by EddieC

For an instant visual, build your Pops an "inside approach" type of device. Not very hard to do with 4 bucks worth of 1 1/2 pvc from home depot and a piece of foam. I think the sole purpose of that training aid is to stop you from casting the club. I wouldn't spend the $80 on the real thing because I think once your Pops understands what "casting" feels like, he'll change his swing a touch and it'll probably be a little flatter. Works pretty quickly also, hit the foam pad-over the top "cast" ; swing it under the pad and hit ball- probably on line, a little flatter swing plane and ball either straight, draw or hook depending on hand speed. Just my 2 cents, and if I'm way off course then I'm sure someone else will correct me .