Adjustable Gas Block vs Tube?

[Hoot]

Thanks for all the good ideas everyone. I'll ruminate on it and come up with a game plan. I have a well equipped man cave and bits as as small as .5mm and taps down to 0-80. One of my drill presses is set up with a B&L stereo scope for fine work. I just thought the obstructing screw would have to be at least a #6 to do the job right and that's probably not thinking outside the 9 dots. I'll figure something out, or simply buy a block. All kinds of options...

Hoot