That L piece vanish zone ditch is the most World Rule thing ever. It almost feels like it wouldn't be right any other way! I know there are some strong World Shirase Secret players, but I'm not sure if there has ever been a confirmed completion -- definitely worth some research on that front. Congratulations on (possibly the first ever?) Shirase Secret GM! (Even if it has been done before, you're definitely among one of the few, the proud, the absurd... ) I was already feeling motivated to come back to Shirase Secret after seeing the m9, so seeing a GM just a day later is giving me even more strength.