Today - FINALLY - I achieved to break through and reach target!
Ok, in 308 steps, but well, it can only improve from there... :D
* 10 minutes later: 2 off! Usually, I feel sad at reaching 2 off, but in this case, am so happy to be that close... LOL
** 1 minute later: Gooooot iiiiit! (Bouncing around my chair)... It makes my day.
What kept me stuck without breaking through for so long, is that the way to park the block to free the unidirectional one is - for me - totally counter intuitive.
Insights