Re: Case Trimmers: Forster vs L.E. Wilson
I agree the Wilson is a better trimmer, but not because of the fear, uncertainty and dread being spread about the Forster.
I mentioned the parts list so that you and/or others who might not have one or have ever worked with one might be able to understand and use the same nomenclature for the parts. I have worked with the Forster first-hand, and I know very well exactly how it works.
Look again at what moves when the Forster collet is tightened. The collet screw advances over the rear tapered portion of the collet, tightening it. The collet is held stationary lengthwise in the collet holder while this happens. The front end of the collet is flat, not tapered, and the inside face of the collet holder is also flat, not tapered. There is no movement of the collet towards or away from the cutter as it is tightened, thus it will not change trim length with the amount of tightening (or with brass rim diameter either, unless it is gross enough to slip to the next step inside the collet). As you said yourself, "anyone with a hint of mechanical aptitude" should be able to figure out that the threaded parts are not determining the position of the Forster trimmer's collet.
When used according to the instructions (insert pilot in neck before bottoming the case head in the collet and tightening it), with brass in good condition (no deformed rims, etc), the Forster trimmer will provide excellent consistency and accuracy in trim length. If these instructions are not followed correctly and consistently, then it will not give the desired results.
I find it easier to use the Wilson to get excellent results, which is why I like it better. I have no experience with the Redding trimmer, but a lot of users share your preference for it.
Andy