I pretty much do everything in the montage. At the very least, I will let it play, with the volume on the PC turned down, and check the peaks before rendering. If all I am doing is adjusting overall gain, I will adjust the master, and do it all over again, to make sure there are no clips. Sure it takes a while, but I am not sitting in front of the computer other than to set, or check, the levels when it finishes.