i have Hayward Northstar 4010N pool pump. I'd like to replace the motor (for cost savings). Will the Vgreen 270 VSP be a good replacement. Will the electronics on the top of the Vgreen allow the pump to fit on the wet side of the Northstar pump? Also, is the Hayward Tristar VSP a drop-in replacement for the Northstar? Can the 2 speed pumps be viable and save as much as the VSP?