Same issues. I don't see the point of that bracket though. Never ever felt the need to rotate an arm further than a regular Bigsby allows.
If you want to put a US made Bigsby on a Korean Starfire, ideally, you'd get a US made Guild Bigsby. It's almost exactly the same as a Bigsby B6, but the standard stock Bigsby-branded B6's hinge is too long for the SF's shallow body. If you look around some, you might find a regular modern (USA) production B6 that was made for some reissue Gretsches that has the smaller triangular Gretsch hinge plate, that would fit a SF.
I'd just give the stock Bigsby that comes on your guitar a chance. thousands of people have used Bigsbies the way they came since the mid 50's. Some aspects like changing strings take some getting used to, but all in all, it's a proved design that works great in its stock form.