I guess the issue of flexibility in sculpting tools is one of preference like so many other aspects of this hobby. For the most part, I object to the extreme flexibility of PTFE as a material for making tools simply because it doesn\'t machine so well as other materials, Delrin for instance. Also, consider that all my past experience has been with tools made of steel as previously mentioned, so I think I\'ve developed a prejudice for a stiffer tool.
When making my tools I have usually cut a length of material (Delrin in this case) about 3 inches long. The purpose here is to make the tool a finished length that can be used without a holder. Having a material length of three inches allows both ends to be machined (or filed) to useful shapes while leaving the whole long enough for easy use. An explanation exists for why I prefer to not use tool holders which is; that for some reason a larger diameter tool (one held in a handle) tends to cause me to work with a heavier hand, while a smaller tool diameter somehow registers in my subconscious as something that needs to be worked with gently. Despite all this I do have tool holders, (X-acto needle file handles with the large ends cut down and rounded) which I use on occasion, mostly with a chisel point tool for applying putty and rough manipulation. Finish work is invariably done with handless tools.
That said, I wouldn\'t find fault with anyone\'s choice of a deferent method and tool employment, especially as so much of technique is personal and a product of what we have gotten used to. Delrin is simply offered as an alternative, that may better suit some different techniques or inclinations, as it does mine.
:drunk:
Ray