A bit OT since my question is re: Londinium
What differences are there between the L1 and LR? I'm seriously considering either one depending on cost/availability. Obviously I can't buy a new L1 anymore (I'm guessing have the original L1 not the L1-P) and if I do buy new it'll be an LR, or possibly the long awaited LC. I'll probably post a new topic re prosumer Levers but thought I'd ask on this thread for your thoughts
They are the same size and appearance, but the main difference is the L1 original (not L1-P, now called L1) fills the piston chamber and basket with water from the boiler using the boiler pressure (mine is set to 1.3 bar). The LR fills the piston chamber and basket from the reservoir using a rotary pump (with a pressure setting that can be adjusted), and is heated by passing in a tube through the boiler. The pump pressure can be set higher than the boiler pressure (the default setting results in about 3 bar at the basket). The setting also makes a difference in the extraction temperature, with higher pressure pre-infusion resulting in higher temperature at the puck. This pump also fills the boiler separately for steam and hot water. The pump pressure setting is done by popping off the top and turning a screw, and is not meant to be changed often.
The ability of the LR to pre-infuse at a higher pressure allows a full saturation of finely ground light roasted beans. With the L1, it doesn't work as well for light roasts under just boiler pressure. Now, I should note, that I have been very happy with the results on the L1 with medium and darker roasts, as I get delicious flavors that taste like the ground beans smell. I stretched to get the LR instead of another L1 to allow for experimentation with the lighter roasts and for the reduced pump noise. The L1 has a vibe pump, that is on longer and is louder. I do have the plumb in kit for the L1, which with the right filtration or flowjet setup for large bottles of water, would make it near silent. I haven't used it yet due to the ease of purchasing Crystal Geyser water from Weed, CA and filling the reservoir.