So this upgrade has been a little less successful. I received the TWM Spectre knob for Christmas. It's good and heavy, and the delrin feels nice in the hand. It looks sharp and as advertised, feels good in the hand under temperature extremes.
The bad news is it's currently rattling like crazy, even under mild low RPM acceleration.

To compound the issue, (and this isn't TWM's fault, but the short throw I installed is just the tiniest bit thicker than stock, and their adapter didn't want to fit without some creativity, more on that below).
Needless to say, I've been in touch with TWM and will be returning it, and possibly exchanging it for the Spooky as I like the white and prefer the spherical shape. I will update this as it develops.
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Mods to date: Volant cai, New Era Ported TB, Torque Solutions short shifter, FE4 suspension with BMR Sway bars, SP 17/8" headers with hi-flo cats, Solo Performance cat back.