I have had Neil Jones dies for years and never had a problem with the set screws. His guarantee and service is second to none also.
I sent one die back to have him tweak it a little and done with no problem and no cost.
IMO the whole ridge on the case neck and partial NS/FL size mantra is only a treatment for sloppy die/chamber match to begin with unless you are fireforming brass and need it to hold the brass in place. As the Neil Jones die matches your chamber requirements a ridge on the neck is a solution to a non-existent problem.
As some pointed out, most top end gunsmiths will have a resize reamer to offer a custom FL die and that is a good option. However, If you have a chamber for which that is not available, then the Neil Jones is a great proven alternative. JLC dies are also good IF redding makes a body die for him to hone and convert.
Neil offers the rolls royce of dies and you will pay for them.
Another alternative is the Harrels dies. they make chamber matching dies off fired brass, but not for all calibers and very cost effective.