Well it doesn't take a rocket scientist to realize that using velcro on a tapered object doesn't seem to work all that well. Maybe in space with no gravity, but hardly on an application where the fork blade cross section tapers and gets smaller towards the hub. Not quite as severe as using velcro on a funnel.

There is a reason people don't install front panniers with velcro.

With that in mind, having actual fork attach points would probably work fine since the pump can't slide down and then rotate into the wheel.

John