“Mine has an interference fit against faema espresso buckets. Maybe test one of your latest batch on a new machine. It could be my espresso buckets are slightly out of round. Beautiful feel in the hand to use though!”
“Great design and nice heavy base, problem with sizing though. I ordered a flat 58.35mm and received a tamper labelled 58.55mm. The base has been perfectly shaped but completely the wrong size, which my calipers confirmed. This isn’t a size even offered online and just barely clears a VST basket without creating a vacuum (the precise reason I decided to buy a new tamper). After emailing Jetblack team in case they’ve been selling the wrong item or need to update their stock listing all I received was an unhelpful response”
“I recently purchased this precise fit tamper to match up with my ridgeless vst baskets, I don't suffer from anything like the side seal issues I used to have, Cheers.”
