Hey Jack,
Came up with this idea. Basically a obsticle you can practise hooks on. I did a rough drawing on paint, hope you can make it out.
As followed :
Let me know what you think.
Sam.
I had a powerball to use not long after I broke my wrist. It got addicctive to see how high you could get the revs going. Before I knew it it had toned all the muscels in my form arm. My nick name at school was "serial masterbater" haha.