I use the snider flow pump because with 3D I want to make sure that I am getting proper fuel flow when performing hovers close to the ground. I don't want the engine to starve of fuel when doing all of the aero bats. These pumps also help with the proper fuel flow for any installation mistakes such as fuel tank too far away or not in the right position for fuel flow. With a $2500/3000 investment in a plane, it's just cheap insurance. Having said that, even with the fuel pump there is always the X factor for things to go wrong.

Ron