obiwanbonjovi? While I totally agree with your observations, I would stress that you are NOT advocating that a builder forgo proper headspace checks with standard gauges. You see, someone might misread this advice - get the one kit that neither of us have, and undergo involuntary plastic surgery at the range.
So - everyone else? Yes - this is an interesting observation of the technical prowess of Czechoslovakia. However - NEVER bet your life (or face) on someone else's technical prowess. Please - use approved gauges, CHECK the headspace on your builds, and do NOT try to claim that obiwanbonjovi told you it was OK to ignore this - he hasn't. He gets to keep his house and car.