The Centurion Stormtrooper Accuracy Set is just that, an accuracy kit, it has nothing to do with the Centurion level. Will it help you to earn the badge? Depends on if you build the armor correctly. The kit does not guarantee you a Centurion badge. The waist belt and hand guards are the only mandatory changes at Centurion outside of what Anovos already supplies.
That being said, Sly and myself have no problem telling applicants, or anyone else for that matter how much we dislike the internal velcro connecting straps, belt and some of the helmet details by Anovos. All of which we highly suggest updating for accuracy sake during approvals. Bottom line, the Trooper bay kit is a nice kit. If you have the $ it's not be a bad idea however, here on the FISD we also encourage DIY.