I am late in seeing this post - but just made the very recipe over the weekend. My first venture into the marmaldes. A few notes: 1. Slicing on V-slicer takes all of 5 minutes. It also seems to squueze the pits out of lemon slices, so no pits to fish out. 2. Final cooking took longer than 2 1/2 hours called for in recipe - perhaps my boiling was to gentle. I would not attempt this without candy thermometer, specially as a beginner. 3. One big mistake - I held up on of the jars for filling with a bare hand (i know better, but..) - reminder keep ice bowl handy!!! It made all the difference, and I don't even have a blister.... The marmalde is divine!