Thor Tampers   

The Ridgeline is  different way to tamp.  You always get a level tamp with a ridgeline because the ridge rides on the lip of the basket.  Flow of the shot is controlled by coffee volume as well as the grind.  The only downside of the ridge is you can't put extra pressure on the puck to make up for too coarse of a grind or not enough coffee.  So in many ways, this tamper forces you to get the volume right as well as the grind.  On the plus side, you always have a level tamp which seems to be even more critical in lever machines.  You get more consistent shots once you have things dialed in.  I personally use a Ridgeline 90 percent of the time. 

Fancy Myrtlewood 58mm tamper for a Conti lever machine.

The Ridge riding on the PF basket.  This controls the depth of the tamp as well as the pressure and makes it perfectly level.

A close-up of the Ridge.  I would love to make a Ridgeline for you!