another_jim wrote:For a home barista, a tamper that is set up for this would be more comfortable, but not a necessity.
I don't know, one home barista's necessity is anothers luxury.
It would be difficult to justify the cost of many tampers based on utility alone. I have a soft spot for fine craftsmanship and good design, and I am willing to pay for it. Now that I have several tampers with different piston shapes -- not just "flat" and "convex" -- Dave's comment ("I wonder if I found the best shaped piston for my machine?"
) really rung true with me. I tend to gravitate towards a favorite piston for a given machine, although without careful study (e.g., by machining several piston shapes for the Macap auto-tamper and testing them blind), it may be my appreciation of a tamper's craftmanship influencing my perception.
As a new owner of the gorgeous Elektra Semiautomatica, I'm sure you understand.