Like Luc said it´s screen accurate and hey..you´re a Stormtrooper, not a hugging-Trooper
Kidding aside you look to have a decent range of motion so I would leave it as is.
Most FOTK makers are now changing their yoke to be more screen accurate and the "half-yoke" don´t give any more mobility as it´s set with the chest plate.
Unless you made a great deal with the paint shop you can save alot of money doing it yourself, given you have a place to paint that is.
This is me and and my fellow FOTK at a recent troop, both are KB props armor, one is painted at a shop and I painted mine with spray cans - can you tell which one? (helmets are Anovos and not painted) Reason I bring it up is that you strike me as a person that enjoy buildning/making/creating stuff so why not go all out
Best of luck, cool blaster and welcome to FISD