I was advised years ago that .06mm helps to drag the LIKE through emissions.
Yeah, sticker says .06mm , and I agree .04>.08 is good.
Setting at .04mm leaves no room for safety to my way of thinking.
The old youtube I found advises .oo4 inches (.102mm)
I have been using that setting for 15,500 miles with no issues.
If my valves are clicking too much, my harmonica drowns 'em out.
I also do not do high speed anything on my LIKE200i.
If I was blasting along at full song on a Florida highway on a LIKE200i (waiting to die - it won't take long) I'd stick to the less violent .06mm probably.
Stig