I'm doing this thing in my application where I replace the user's hand with a tool (like a teleporter, lighter, etc.). Temporarily, and use some finger extension detectors to fake a 'grab' state for activating/deactivating the tools. This of course, leads to an amusing bug where the BrushHands are still active, so you can 'grab' things with your teleporter hand.
I tried just disabling the BrushHands gameobjects to disable them, but the system didn't like that as it gave me errors about running coroutines. Is there an official method for doing this? Disabling a single brush hand temporarily and then turning it back on? I'm not on the latest version of Interaction Engine yet, if that would change anything.