Hi, I've been using the DRDT-2, I am dimpling .025 and .016 right now and I've done the no preload 1/2 turn 1 turn past contact of the dies ect. I hold it up to reflect off a 4 ft light to see deformation and it is as it's supposed to be with no preload. If I preload all I see is the rivet sets a little deeper in the dimple. My ? is if the rivet is just a smidge recessed on no pre load and I get a good reflection why the heck would I want to add more preload like all the instructions says too. If it is setting ok with no preload what am I missing. I'm happy with the looks but according to the guru's I'm not setting up to specs. I get the halo of the die and the correct reflection, the rivet is recessed what else is there to it? Maybe the different make of dies act differently in the tool. I use Cleaveland. Gene