I play with a Titleist TS3 Driver standard length Hazard RDX shaft. I want to go to a Driver 2" shorter. What replacement shaft length do I need?

I ordered a 43" shaft, -2". Golf works club measuring tool gives me a 45.25 " Driver length with my existing Driver shaft/head and a 45.25" with the 43" shaft/head replacement. What shaft mearsument am I'm looking for to reduce my Driver length by -2".