The Op. Terra kit looks good ; much akin to the Litech Trek Kettle I have. I'd swap out the original 123 cup though, it's a bit small and alu with it (burnt lips). There's several alternatives in SS or Ti, that are a good fit on the stove and have substantially greater capacity.
Nooooo! Not the Terra. It's too small for a whole Svea123R. You want the Optimus Terra Week Ender HE [with the heat exchanger].
Thanks man. The meal was always the highlight of our hikes. Had to make it count. I think you were the one that told me about the Litech. I ordered the Optimus, then came across the Primus right after the fact. I still have it favorited. May end up getting it too. Rumor has it, I may have a 123 heading my way, haha. We both have GSI glacier cups we take with us. Sometimes we take out fold-a-cups. Glacier: Fold-a-cup, next to the Snowpeak 1 Kettle: When we do a day hike, I normally just use my slingbag, with water bottle holder: I did get the HE.
I really like the larger Optimus HE pot, an excellent product, reasonably priced. It's in my first line service. I've never done any time trials for a given amount of water, but it seems to me, in use, it may boil the coffee water in something like 20 - 25% less time. I can remember being a little surprised while making the coffee preparations by, "Oh, the water's boiling already...." Paul