not sure what IK's are...

[susdu]

when edging while lying on my back, I can stop stroking and notice tiny movements (spiking) of the penis. This is very subtle twitching that occurs every 0.5 sec. There is no way I would notice them while stroking, the only way I can consciously experience it is by stopping all movement and concentrating on my penis.

Is this the IK's that cause PremE and that I'm trying to avoid?

[bigborer]

Yes. Search about RKs (reverse kegels), and after you learn how to do them, you can also use them to counteract any IKs.
And (if you haven't done so already) I recommend you to read all the sticky topics from the "Premature Ejaculation Forum".

Good luck!