Just as an asside, valves that are too loose, I am told, do produce more wear were the cam wacks the rocker.
Screw ajusters are funny things. I have owned many bikes with them and they seldom change much, but I am real slow and methodical when I set them.
For instance, I am careful to set both valves on one forked rocker as close to the same as possible and I kept records on my connie over the last 9 years. Once, there was
an interesting un-explained 2 thou. change on two valves at the 8,000 mile check. Then no change at all on any valve on the next check.
My Honda CRV, which does 2900 rpm at 60 mph (manual tranny) needs its first adjustment at 110,000 miles "unless they are making noise".
I am going to have Honda do the 8,000 mile check on my NT and then do the rest of them. If I find nothing amiss at 16,000 , I will probably go longer, especially if it looks like I could hurt a sensor, etc.
One thing I found out on my last C10 valve ajustment was I wasnt worth crap at estimating screw nut torque. I was so shocked I tried two torque wrenches.....from now on, I use a torque wrench on the nuts.
BTW, what is the torque on the NT nuts?