As you've found out, you can do it without a dubbing brush, it's just that a dubbing brush usually makes it easier and sometimes give yu the option of doing other creative things at the bench. I've made well over 100 dubbing brush twisters and they are not difficult to make. Send me a PM if you'd like the plans to make your own. That way you can have the best of both worlds. Just one other possibility.

Jim Smith