Not quite a prometheus but fits my budget much better.
Great thread going on accuratehooter about the autotrickler and how some people are modifying it.
Here is my setup. Set to 42.68 grains of H4350 Occasionally will throw an extra kernel so I set it to 42.68 and drop one kernel with the Omega trickler if needed to get to my preferred load of 42.7 grains
https://youtu.be/I1RyTFNEcME