narc wrote:The 49mm RegBarber tamper I use is 49mm.
For reference the basket is at 0.5cm =49.85 mm, at 1cm =49.74mm and at 2 cm=49.50mm
Measured with a high end digital/analog caliper.
I like ~0.9mm space. No detectable friction between the sides of the basket & tamper due to grinds trapped between the two. On the other lever machines with a 45mm basket the size difference I think is 0.7mm. No problems with jamming.