I've had the attachment set trainroomgary showed in his post for many years. I usually use it with the larger brush that is shown attached on the end of the hose.
I only use it with a regular hoover upright vacuum with the attachment hose. I don't find it's too bad in terms of the concern Ben raised about pulling details off. I guess it possibly could if a stronger vacuum was used with it.
It's not shown in Gary's photo, but the end that hooks up to the vacuum hose has a small rotating adjustment to adjust some holes that help to limit the suction if it is too strong. I've not experienced that with my setup though - I even occasionally end up using my other hand to cover the holes for better suction while going over an engine. Again, YMMV, depending on what kind of vacuum you hook it up to.
I've also got a few separate handled brushes with soft fibers (but rigid enough to displace dust) that I probably bought at a train show from one of the tool dealers.
-Dave
