I don’t have an SL, but an SA is only 100# lighter and the 16x13.9 is an awesome prop.
The thread color is intended to be decorative, I would try to use it as an accent versus trying to make it disappear.
Not sure on your exterior color, but using a thread color that matches one of your exterior colors is first class at tying the boat colors together.
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2021 Supra SA 400
2018 Supra SA 400 (SOLD)
Michigan