Yes, works very nicely, no problem at all. Just tell the shop what you want to have. However, I wouln't recommend an activator. I use plates that fit tightly on the upper jaw, like two Adams clasps on each side or something like that. I have an expander and a reverse twin block with facemask hooks (just tell the shop to add such hooks). A Fraenkel or an activator that sits tight in the upper jaw might work, though.
--SC
