Success! [&:] After some efforts and sweating, it started and ran for a few minutes. I'm glad I was wearing my headphones, it is incredibly LOUD! [X(]
It needs a full needle adjustment (it only worked with 50% throttle or more and reacted very slowly to input), but I was able to create a blue smog cloud in the workshop.
I hope to have more time next weekend to do the basic stuff (plug the hole & enlarge the spacer) and measure rpm after each change (my device was unable to "see" the prop).
Thanks guys!