Not really a new idea or the best I've seen. The velcro straps will permit movement/rocking of the handle back and forth. The best I've seen was a pic posted by the inimitable Waveslave. His quote "I adapt stuff" His mod, was attached to the base of the pump,looked like a far more a solid connection than a couple of flimsy straps.
I plan to modify my own pump for next season, a la Waveslave. Hope he didn't patent his idea

. If I remember correctly , (it was a few years ago) he copped a negative response from a mouthy juvenile, who will, one day want a pump that doesn't make his back sore .
You can't pay a man a greater compliment , than to copy him

Post that pic again 'slave, you old bugger


. cheers, J