[SECGolf]

Here's what helped me:

Get a 4 foot dowel with 1 inch diameter. Act like the dowel is the club. Take your old address (forearm not on plane). You now have a starting place for your plane angle. Now grip down (a forearm length ~12inches) on the dowel. Make sure pressure points # 1 and #3 are in the correct position, on the aft side of the dowel (not underneath or not on top). Now bend the elbow until the right forearm is covering the top 12 inches of the dowel. You can check this by placing a mirror behind you. You should see the right forearm covering the dowel (top 12 inches of dowel not visible).

A key might be that, during this process, the body should not be rigid. The hips, shoulder, knees, and head should all accommodate so as to allow #1 and #3 PP, forearm, and dowel on your plane line. Body is variable, Pressure point position (pointing at your plane line) is your constant.

Another thing is that, for at least a while, this will feel strange and different - it felt horrible to me. Do it a little each night for two weeks. Now this position feels very powerful to me.

When at the range or playing, the only thing that I could depend on (at first) was to feel that my elbow was really, really bent at address.

Eventually, I was just able to do it every shot (confirmed through video). Now, forearm on plane feels normal, "arms hanging" actually feels incorrect.