[NickRCarter]

No they are definitely not opening. The paper clip is at the top of the rod. When the diaphragm is retracted by vacuum this rod goes upwards. So any actuation would move the clip downwards. The only other way it could move down is by vibration, which would only confuse matters, but so far its stayed put.

Initial aceleration is good and smooth, but wot is definitely lacking.
Cheers Nick