Gavra, thanks and thanks. I think my remaining point to you would be that if we overemphasize the technical issurim here, we risk having the ability to decry something which has no technical issur.
So, we do as The Chazon Ish and Rav Schechter say; we leave it to the gedolei haposkim of our dor. Only in this case, even before having seen the opinion of any poskim, it was blatantly obvious, at least to me, that this is a case of zilzul Shabbos.