This may be controversial but here goes:
The difference that players and cue makers alike see between different joints and pins has very little to do with strength or hardness of materials. Or even vibration transmission. (This is just my opinion that has developed from my experiences and testing over the last 20 years or so.)
The difference comes from weight. I am not talking about balance, although these changes can affect balance. The difference really comes from where the weight is in relation to the nodes of the cue. A node is the natural pivot point to a vibrating object. If you put weight directly in the middle between the 2 nodes this provides the most resistance to movement when the object starts to vibrate causing a very short amplitude and high frequency vibration. Basically the more the weight the more energy or forces necessary to move that weight sideways. If you remove weight in this area, then it is easier to move and moves further sideways with the same force. You end up with a completely different sine wave. The amplitude is much higher, and the frequency will be much longer.
Again, these are my observations. If anyone disagrees, that is your right. I am happy to hear your responses,
but please lets make this a war. I am really too busy for that.
Royce Bunnell
www.obcues.com