Hi Daniel,
Thanks for the help, that's a really neat workaround. In some ways it's opened up other ways of quickly reviewing clashes because if you set the transparency really high (say 0.95) and turn off wireframe for transparent dimming, you can still see all of your clashing elements quickly but you also get the benefit of seeing them in context. Not to mention that you can see still how many clashes you actually have on the clash 'dashboard', rather than just 1 clash because you've grouped them all.
Not wanting to sound negative, but a drawback to the transparency approach is that things like quick properties still see the transparent elements first (even if transparency is 1), meaning that it can be tricky to identify what a particular cylinder represents.
Thanks,
Colin