As I understand it the Astoria Argenta Junior DOES NOT have any pre- infusion option . but is there an option to add that ? And is it helpful ? For instance Chris coffee offers an adapter ( Chamber ) to add pre infusion to the Vivaldi , and I know there is a similar part that can be added to the La San Marco single 85 Practical ...maybe something along these lines ?

Give Chris' coffee service a call and ask them for advice. Best case they can help you get it set up; worst case they say it isn't possible.

Thank you I am planning to call Chris Coffee ... I got side tracked because through a search on HB it seems that some members were able to do so with an adjustable delay relay which s a slick way of getting that done but I am still searching for the rest of the details .