I believe most of the 1U stuff you've picked is in the 1U Intellijel format. So as long as your case is Intellijel, you're good.
However the RE Guillotine is not in the Intellijel format. It's not going to fit in an Intellijel rack.
-- Ronin1973
Can I ask where you got your info about the Guillotine ? I'm interested in the module as well, precisely because I think it is an Intellijel format one. The demo version shown in the video is fitted in an Intellijel case, as are all their other 1U stuff on demo, and the only 1U module they have for sale on their website now, a 4hp blank, is advertised as Intellijel format too.
Everything else is made by Intellijel so by definition compatible, except the u3A which is made by Transient Modules, I own one and confirm it's in Intellijel format as well.
--- Voltage control all the things ---