I have been using the Ultraskin Ivory medium tip and really like it.
It holds it's shape well, holds chalk well, doesn't need much attention, and I like the feel and sound on contact.
I will be trying the Fire medium next to see how it performs.
As stated... nature of the wood can cause issues... not limited to user handling.
I have witnessed kiln dried wood warp overnight for no reason or warp years later.
All cues are subject to warpage due to the nature of wood as well as storage habits. Even with the best technologies issues can still arise.
My Meucci from the 1990's is still straight as the day I bought it.
I spent a few years working in a cabinet factory building cabinets and furniture. I built a chest of drawers for my wife from quarter sawn oak and it is beautiful. I appreciate the look of beautiful wood grain and am a big fan of stained birds eye maple.
McDermott is not dead as they still offer their high end McDermott cues with a lifetime warranty even against warpage.
They have been forced to rely on cheaper imports to keep up with sales and compete with Walmart to reach those casual players and weekend warriors looking for talk & toss items...
McDermott in Wisconsin...
McDermott cues are made in Wisconsin and come with a lifetime warranty against warpage.
Star cues (limited lifetime warranty) and Lucky cues (3 year limited warranty) are made in China.
I have checked his videos out and they are pretty good.
However theory vs sustainable research leaves a lot to be desired.
I would like to hear what Bob Jewett has to say about differences in various shafts and tip reactions that he has experienced with his study on Iron Willie and Meucci's Myth...