I loved my Vulcan...
I have TWO Vulcans.As a point to note, the side pockets are a little on the small side so if you prefer extra capacity you can swap them out for olive green brit army PLCE ones. Same zips.....
One's called "Spock", the other "T'Pau"!
I can't tell which is which but one of them takes Berghaus side pouches (size 8 zips, "upside-down") whilst the other takes PLCE (size 10 zips). Side pouches off, aside from the ice axe buckles/straps, they look identical to me but I've not made a proper side-by-side comparison yet.
I believe one is Dutch(?) military issue (PLCE compatible). I've seen some Crusaders with British NATO NSNs (National Stock Numbers) so these should be PLCE compatible.
If you can check them before you buy, bring a PLCE side pouch just to check compatibility - if you want that option. The easy tell, though, will be from where the zips start: top is Berghaus, bottom is PLCE. The zip pulls will have an "8" or "10" and that indicates the zip size.
If I could work out how to use Pinterest for pics hosting - or even what Pinterest is good for - I'd put some pics here. (Yeah, I know - I'm THAT generation...)