Well then I recon I'm incompetent and am doing everything wrong - because I've loaded with 4-die Lee sets from day 1.

357/38 and 44mag/special all get a good solid roll crimp from my FCDs.

380/9mm/45ACP all get a nice taper crimp from the FCDs for those cartridges.

It has worked well for me so far, so I see no reason to change - regardless of any opinions to the contrary.

FWIW, the way I adjusted mine is with the FCD body just barely "kissing" the shell plate with the ram in the full up position, I turn the adjuster down until it makes firm contact with a round that is ready to crimp. Then I lower the ram, turn the adjuster another 1/4 turn and apply the crimp. If it isn't crimped enough, I lower the ram and turn it another 1/4 turn and crimp again. I repeat this until I get the crimp I want. I've never had to turn it more than a full turn past the point of initial contact and usually 1/2 - 3/4 turn gets me the crimp I'm looking for.