I stopped tapping after getting the naked PF and things have improved for me. The Vario makes such a fluffy grind I found I can go from the grinder and tamp with no distribution and the little left overs on the side walls don't really do any harm.
I need to find one that will fit my hand better, mine is good but just not perfect. So if anyone is taking notes I would like a Reg Barber convex tamper for my birthday, screw that I am going to go look at them now.