To separate the idle cam from the choke

At some point I would like to separate the idle cam on my carb from the choke and have an adjustable idle setting that doesn't involve the choke plate.

The reason being that in weather that is on the warmer side I can start my car and adjust the idle for the engine to warm up without the choke being involved.
Or I can set the idle wherever I want it.

The way it works right now is I start the engine and it may not be cold enough to set the choke enough to set the idle higher.
I don't want to set it to choke more just to have a higher warm up idle.
I also usually let the engine warm up close to running temp before I drive it and it would be nice if it could idle at say 1,200 RPM instead of 500 until it warms up all the way.

If I smooth the idle cam steps off so the cam is smooth but still ramped and polish the screw tip a little convexed and lube it with a little grease I should be able to alter the idle speed without ever touching the throttle.

I could make it real simple and just use a choke cable kit, but I would much rather have a twist dial instead.
I could build that using a cable kit, a threaded rod, a few small washers , a few nylock nuts, and a bracket to contain the twist to push pull conversion mechanism.

Don't think I have ever seen a device that converts push pull to a dial.
I even thought about using a stepper motor and controller, but even though that would probably be cleaner I wouldn't have a random cable under the hood it would cost a lot more.
I could use something like a twist and lock throttle cable but no one seems to make one compact enough, as they are all big bulky industrial looking things.

About a 1 inch round knurled edge twist knob that moves a cable in and out about 1/8 inch per one full knob rotation would be perfect.

Any idea I might be missing?