I have a junior Pro No Mar and have done lots of spoke wheels on it. I use the other accessory blocks to hold the wheels but find I can go faster / easier with spoons on those wheels and just use the changer to secure them.
"Only a biker knows why a dog sticks his head out of a car window."
* 2012 BMW K1600GTL
* 2013 Triumph Scrambler
* 1982 Kawasaki GPz 750