Titleist conversion
Although the pictures aren't very good, it is easy to see that by adding a sleeve to the bottom, the butt can still be .850" - .860" at the joint, and still keeping the full splice.
IMO, if thinking about cutting up a one piece Titleist to add a handle section, why not just build / order a new forearm with the traditional Titleist veneer colors. You have now lost the full splice, and you could then chose any point / butt wood desired (ebony), and probably would be of a similar cost vs buying a one piece to start with, and then building it.
If the forearm is too thin from the start, the points will end up too near the joint. and to me that doesn't look right either.
The two shown had enough meat in the forearm, the other 3 out of a lot of 5 cues didn't make it.
On the other hand , I have experimented with a few conversions that ended up being under .800" at the joint, and they shot surprisingly well.
Thanks,
Rudie