Smooth Stability, B-Stinger, Doinker - all of them are about the same weight for their target long stabs (28" to 30"). They are light with no weight on the end.
Be aware - at 20", there needs to be more weight to stabilize.
For example - my 28 inch Smooth Stability High Roller and my one off 27" B-Stinger XL uses about 3 ounces of weight. My son's two B-Stinger XL's at 24" uses 4 ounces of weight. At 20", you're looking at anywhere from 6 to 8 ounces of end weight.
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