3. An entirely new geometric design taking advantage of Delrin's workability and finish.
The workability advantage of delrin, compared to metals, is that the material is removed much more rapidly.
So, for making large pieces, which would take many hours to be made of metal with a lathe like the mine, delrin is an interesting alternative.
In the past I used aluminum for to make the same pieces that now I made with delrin;
these pieces have a thread and are for the closing of the case of the top. But aluminum is not slippery, while closing the case the thread tends a bit to seize, nothing serious but this is a reason that I wanted to try a different material.
I am happy about the choice because with delrin now the closing is smooth, how I feel it should be.
As for the geometry of the top, I don't think that delrin would give me more freedom than the materials I use usually.
At the countrary, delrin being a plastic, softer than metals and hardwoods, would constrain me to more massive shapes for to maintain sufficient stiffness. Particularly, I would feel constrained to make the stems shorter and larger than I would like.
But also for the other parts of the top I wouldn't use delrin.
Cores are lighter and more beautiful when made of wood.
And, for the flywheels, metals are more suitable because of higher density, (at least, if longer spins are wanted), and more beautiful.