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If your vp is borderline, getting ready to fail, tapping the wire will push it over the edge! You can buy the edge comp and not tap the wire. The Comp will work on the lower settings just not 4&5 without tapping the pump.
I still have my Drag Comp and wouldn't get rid of it but the plan is to keep it without the tapped wire and go with a little bigger injectors to compensate a little.