Sure...
If you look at the last step of fabrication of the Distalizer Video you will see we solder the terminal end of the IPC so that the IPC cant separate from the tube, there is no way the coil spring can "fall off" of the appliance. So many piston like appliances allow the coil to escape from the appliance and I worry that with the sharp ends of the Niti (if swallowed) they would be hard if not impossible to pass.
I can email you photos if what I am saying is not clear, I would post them but I am not too good at it yet.
regards,
Don
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