I can do it rather easily but my accuracy is a little more suspect with it than my normal release. I've tested it out I'm about 85% with a normal release and about 75% with the back up but in some of my wood lane houses in open bowling the lanes are so dry unless you can hit 20 mph with the spare ball your going to hook around the 10 even with plastic if you have any hand at all.How easy could one learn this release and be consistent with it?
Not really it also depends on how you throw the backup. The backup ball that you may be familiar with is the backup that was featured by a lot of female (even pros) bowlers in the 80's which is done by the elbow coming inward during the swing (the ball actually hooks right). Male physiology doesn't blend well with that and if you try it your going to develop an injury and bad habits.Will it ruin my consistency as it is total opposite of what a normal release is?
The Norm Duke method which you can get more info on youtube features keeping the hand on the inside of the ball (which is a good thing to learn anyway) and simply brining your fingers through the inside of the ball instead of around the outside of the ball (best way I can describe it anyway). So this method in my opinion promotes good habits and won't injure you. Don't expect this ball to hook left to right though it just makes the ball roll straight with very little rotation.
Hope it helps
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