In questioning the OP's opening post, It is not necessarily that all wood warps. In most any wood, a warp can be induced, but, in old, very well seasoned woods, the main reason for warpage is internal tensions within the wood. These tensions exist , mainly due to environmental conditions which the tree was subjected to while still alive, like living on a windward slope, exposed to high winds, uneven weight due to the tree leaning, tensions set due to heavy branches, and countless other individual circumstances.
Most likely, any wood that has been correctly stored and seasoned for many years, yet is still warping, either it is due to internal tension, or it is a species that is less stable.
In the case of Ebony, or Cocobolo, or similar extremely dense, and/ or resinous woods, no matter how long they have been seasoned, it is a good idea to let them rest again after rough milling to a dimension close to the final dimension, as moisture will only move through solid timbers of these species to a degree and no more. When they are cut into, they need to season some more so that the exposed bits can come to equilibrium.
Yes, it is very possible to make an item like a tonearm wand that will predictably hold it's shape, and not warp. The main factor is how carefully the piece is made, mainly in 'working with the wood' and not against it's nature.
Most likely, any wood that has been correctly stored and seasoned for many years, yet is still warping, either it is due to internal tension, or it is a species that is less stable.
In the case of Ebony, or Cocobolo, or similar extremely dense, and/ or resinous woods, no matter how long they have been seasoned, it is a good idea to let them rest again after rough milling to a dimension close to the final dimension, as moisture will only move through solid timbers of these species to a degree and no more. When they are cut into, they need to season some more so that the exposed bits can come to equilibrium.
Yes, it is very possible to make an item like a tonearm wand that will predictably hold it's shape, and not warp. The main factor is how carefully the piece is made, mainly in 'working with the wood' and not against it's nature.