hi guys,
I just went through this and noticed that no-one has held the coffeelab and espressocraft tampers by holding them only by the bulb. Luke Shilling (moreso than I) has been playing with different hand grips for these tampers and we both found that by moving our hands up the tamper piston and gripping just the bulb we have the weight of the tamp centered evenly downwards. This makes for a much better feeling when tamping because everything feels 'more right'. It results in a little less eyeballing to center and level the tamp.
It also makes it so that our fingers don't feel worn out by taking the pressure of the tamp. Luke during his coffee cart periods finds that this grip helps him reduce the wear and tear on his tamping arm. It wasn't something that was apparent to me and Luke has been doing it for ages hah. Anyway I only really sussed this out in the past day or so but the results have been fantastic.
I might also add that we are more of the 30# tamp rather than the super grunt tamp and that's what this method seems most well suited to.