I actually think the faceplate was the issue with mine. I found that without the faceplate, I had zero issues. So I then tried to isolate which part of the faceplate was the issue. Turns out, lightly sanding the faceplate where the buttons are resolved my issue. If I nudge the faceplate the wrong way, the issue comes back. But for now it seems to be ok.
Well you caught my attention with the faceplate and I removed mine to make a test for a few days...: no more stuttering. Today I took out the Dremel and gently grinded all around the inner opening of the faceplate and reinstalled it. Problem solved.
Thanks mate