I popped it on for a brief time on International Tiara Day. It was very uncomfortable after just 10 minutes. Not good. Unfortunately it's the one I plan to wear for the Gala, which means roughly 5 hours.
Of course, there is a solution: the tiara frame. (All pictures are links.)
A frame is a wire foundation, not mean to be seen. It helps a tiara to float above the wearer's hairstyle, keeping decorative lower elements from being hidden.
Often the wire frame is covered in velvet to match the wearer's hair. This both softens the feel of the tiara on the head and helps grip the hair for greater stability.
A frame can also be added or removed to convert a necklace to a tiara, or vice versa.
And finally, a frame can make a difficult or painful-looking tiara wearable with comfort.
That is the primary reason I will be making one. The 1860s hairstyle does not allow for any kind of padding at the top of the head, so I simply must make some kind of frame. The other reason is that the tiara doesn't fit my head quite right! I haven't tried again with the pliers, but I have misgivings that I'll be able to bend the short loop ends in closely enough to hold the tiara at the right angle. I think with the frame I will be able to fill in that gap. Here's hoping!