I realize that you have already placed your order. Not one of the cavessons, except perhaps the Baroque,and the one from marjoman, I’ve seen linked on this thread has the capabilities of being used as that which is patterned after the one used by the SRS.
That cavesson has a lip strap that is set so that it may be used as a drop nose band. It then can be used under the bit, allowing any “arrets” to be felt through the bit. This is very useful when starting a youngster. They come to equate the vibrating feel of an ''arret" with the verbal commands.
Mine is some 50 years old, and still going strong.
