as you know most of that list consists of tracks made ineligible for the boxes based on the fuzzy remit of officially released albums and singles of the era, and not outtakes and later finds. of course this hasn't stopped them from including later reconfigurations of live albums, random remix albums and (with box three) a thrown together EP. so, from your list only Revolutionary Song (single version), and Cat People (extended version) can be considered "missing". to these i would add the 7" single version and US/German 7" promo edit of Cat People, and the Low sampler. i assume the master for the latter is long gone and piecing it together would require more effort than has been afforded other recreated edits to date. regardless, those five examples are all official RCA/MCA UK and/or US releases and do fall under the same category as other tracks previously featured and by omitting them highlight the sets' inconsistency. moreover, there's a unique Dutch edit of Cat People but a) it's lame, and thus b) would be overkill. i assume the Peter & The Wolf album is out of the estate's hands too, but IMO it's part of the discography and released on RCA to boot. for that reason it would have been "nice" to include the US promo edit in place of the missing LP side. that said, i'm sure the above suggestions fall into the "for the completist" category in the eyes of both Parlophone and their prospective audience, so this is not a call for their inclusion, just an "FYI" round up. another thing your list suggests is that period tracks issued after the box set's timeframe will only be included if they are not tampered with after the event. for example the last box included the John, I'm Only Dancing (Again) single version, recorded for Young Americans but first released in 1979, while the Sound + Vision remix you list is not included in the next box despite being issued on 12" single in 1991. the reason presumably is that it was remixed in '91 and contains new production elements. whether such remixes (and there are several including the 2013 Sound + Vision "Xperia" version) will play any part in future boxes remains to be seen. might have a lie down now, i've out-nerded myself.