If you need a taper dial on an actor which doesn't have one, it can be inserted into a cr2 or pz3, using a cr2 editor. Example follows:

taperY taper { name taper initValue 0 hidden 0 enabled 1 forceLimits 0 min -100000 max 100000 trackingScale 0.04 keys { static 0 k 0 0 } interpStyleLocked 0 }

Add the above block to the Channels section of the actor to which you wish to add the dial. The "taperY" listing can be edited to "taperX" or "taperZ" according to need.

Edit: I don't know why the hell I expected Rosity to permit me to post a section from a cr2. Of course it won't do that. Rosity never does anything, anymore. Feh.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.