[tfdanos]

can someone please describe the right forearm pickup in some detail? thanks

There are several good replies to your question. I'd like to offer these thoughts.

The right forearm pickup increases the odds for a geometrically correct back stroke , especially if extensor action is applied (assuring the left shoulder is the steady radius of the back stroke motion) and the right elbow bends immediately.

An impact fix with the right forearm on plane, and then an adjusted address without changing the plane angle, produces a great place to begin the backstroke using the right forearm pickup.

Hope this helps