I had read somewhere on here during too many hours of research before my recent build, about the plate on the nt carb that you can drill thru and find the adjustment screw. If anyone can shed some light on this, it would be great. I tried to drill the left gold plate, closest to the front of bike, but went in fairly far to no avail. How far do you have to drill to get to the screw? Any help with this will be greatly appreciated. Want to do the valve adjustment and carb tune next.