Originally Posted by Tom Pamperin
For that high elbow:
Nothing refines your skill at holding a high elbow/vertical forearm through the stroke like swimming over a huge field of staghorn coral flats at low tide.
If you don't have a coral reef handy to try the real thing, it could be a useful visualization just to imagine it. Water so shallow that if you don't keep your elbow at the surface, you'll be scraping bottom with your fingers.
Nice trick, Tom. Strong visual and emotional imagery to base the mental focus on!