Thanks Mike,
Neither jogging nor motion smoothness should be effected. The only reason I can imagine it would be is if the host PC is maxing out its resources. What are the PCs specs and have you ran it while monitoring resources?
When finding the center it should end at the center of the feature your finding the center of. Is your touch plate height and tool diameter set correctly?
If probing is working in your motion device plugin I think it will be OK. If your not running Mach4 version 2.2914 with all things default, you should be (the ReadMe that was included elaborates on this if I am not mistaken).
I would like to see it do a double touch for extra accuracy.
Since this is meant to be used with tools or probes, your Probe Feed Rate needs to be as slow as necessary for your machine to touch and stop before hurting the tool or touch plate or part. Since there is no intent for it to ever touch at a higher rate than this, double touch is a moot point. However, you can edit the module to add this option if you like.
I doubt I will ever add the bit to increment through tools with each touch. Hopefuly if anyone wants this it will easy enough for them to add that option.