DopamineNL: Hmm, yeah, probably during new years eve or some other fireworks-related vandalism.
Well, this one's done. I've tried two places, the last one should have been safe from bypassers and people watching, but quiet spots do attract a nasty crowd sometimes.
Besides, it never became what it was intended to be: an easy and quick traditional of significant size within easy distance from Schiphol, and/or for travellers to/from Amsterdam.
Most visitors ended up being local Dutch. No disrespect there, but they weren't the targetgroup to begin with.
So long, Sloterdijk cache! And with 'Vol!' and 'zicht op de knip' there are still enough more than enough superfluous caches on ugly spots in this neighbourhood left! ;-)