This is my DRDT-2 dimpling tool. It's more expensive than the usual C-frame dimpler, but it rocks. It's easy to dimple one-handed, it's stress-free, and it makes no noise so I can dimple at night without waking up the neighbors.
I used the well-known trick of removing the blue plastic along the rivet lines using a wooden straightedge and a soldering iron, and it worked great.